[X64] [EgorBo] JIT: Bulk copy of byrefs

[MihuBot]

Build completed in 32 minutes.
dotnet/runtime#101761

Diffs

Diffs

Found 260 files with textual diffs.

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 38861902
Total bytes of diff: 38856617
Total bytes of delta: -5285 (-0.01 % of base)
Total relative delta: Infinity
    diff is an improvement.
    relative diff is a regression.


Top file regressions (bytes):
          41 : System.Net.Sockets.dasm (0.02 % of base)

Top file improvements (bytes):
       -5315 : System.Collections.Immutable.dasm (-0.25 % of base)
         -11 : ILCompiler.Reflection.ReadyToRun.dasm (-0.00 % of base)

3 total files with Code Size differences (2 improved, 1 regressed), 253 unchanged.

Top method regressions (bytes):
          41 (Infinity of base) : System.Net.Sockets.dasm - System.Net.Sockets.SocketAsyncEngine:UnregisterSocket(long):this (FullOpts)

Top method improvements (bytes):
         -52 (-9.40 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -52 (-9.94 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -52 (-9.35 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:this (FullOpts)
         -52 (-8.87 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -52 (-9.35 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -52 (-9.67 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -52 (-9.47 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[System.Numerics.Vector`1[float]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         -52 (-9.47 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -52 (-9.68 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.Numerics.Vector`1[float]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         -52 (-9.68 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -51 (-5.34 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.__Canon,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -51 (-5.73 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.__Canon,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -51 (-5.69 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.__Canon,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.__Canon,System.Nullable`1[int]]]:this (FullOpts)
         -51 (-5.32 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.__Canon,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -51 (-5.69 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.__Canon,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -49 (-5.59 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[System.__Canon]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -49 (-5.55 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[System.__Canon]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.__Canon]:this (FullOpts)
         -49 (-5.55 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[System.__Canon]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -49 (-5.79 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.__Canon]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.__Canon]:this (FullOpts)
         -49 (-5.79 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.__Canon]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-8.76 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[double,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[double,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-8.76 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[int,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[int,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-8.76 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[long,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[long,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-8.76 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[short,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[short,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-8.76 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-8.76 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[ubyte,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[ubyte,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[double,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[double,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-8.54 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[double,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[double,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[int,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[int,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-8.54 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[int,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[int,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[long,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[long,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-8.54 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[long,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[long,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[short,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[short,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-8.54 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[short,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[short,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Nullable`1[int],System.Nullable`1[int]]]:this (FullOpts)
         -48 (-8.54 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[ubyte,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[ubyte,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-8.54 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[ubyte,System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[ubyte,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[double]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[int]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[long]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[short]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[ubyte]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[ubyte]:this (FullOpts)
         -46 (-8.61 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[double]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[int]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[long]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[short]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[ubyte]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[ubyte]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-7.10 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[System.__Canon]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[double]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[int]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[long]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[short]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-5.83 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[System.__Canon]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.__Canon]:this (FullOpts)
         -13 (-5.83 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[System.__Canon]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)

Top method regressions (percentages):
          41 (Infinity of base) : System.Net.Sockets.dasm - System.Net.Sockets.SocketAsyncEngine:UnregisterSocket(long):this (FullOpts)

Top method improvements (percentages):
         -52 (-9.94 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[double]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[int]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[long]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[short]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[ubyte]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[ubyte]:this (FullOpts)
         -13 (-9.92 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.85 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -52 (-9.68 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.Numerics.Vector`1[float]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         -52 (-9.68 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -52 (-9.67 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[double]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[int]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[long]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[short]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[System.Numerics.Vector`1[float]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[ubyte]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[ubyte]:this (FullOpts)
         -13 (-9.56 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Builder[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -52 (-9.47 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[System.Numerics.Vector`1[float]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         -52 (-9.47 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+Builder[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -52 (-9.40 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
         -52 (-9.35 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:this (FullOpts)
         -52 (-9.35 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[double,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[int,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[long,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[short,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.27 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2[ubyte,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[double]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[int]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[long]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[short]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[System.Numerics.Vector`1[float]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[ubyte]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[ubyte]:this (FullOpts)
         -11 (-9.24 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1+Node[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[double]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[int]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[long]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[short]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[ubyte]:System.Collections.Generic.IEnumerable<T>.GetEnumerator():System.Collections.Generic.IEnumerator`1[ubyte]:this (FullOpts)
         -46 (-9.09 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1+NodeEnumerable[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -46 (-9.07 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableHashSet`1[ubyte]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[double,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[double,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[double,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[int,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[int,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[int,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[long,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[long,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[long,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[short,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[short,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[short,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Nullable`1[int],System.Nullable`1[int]]]:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[ubyte,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[ubyte,System.Nullable`1[int]]]:this (FullOpts)
         -48 (-9.02 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableDictionary`2+Builder[ubyte,System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-8.94 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1[double]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-8.94 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1[int]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-8.94 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1[long]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-8.94 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1[short]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-8.94 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1[System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -11 (-8.94 % of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableSortedSet`1[System.Numerics.Vector`1[float]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)

219 total methods with Code Size differences (218 improved, 1 regressed), 240319 unchanged.

--------------------------------------------------------------------------------

Artifacts:

• build-artifacts-main.zip (668 MB)
• build-clr-checked-main.zip (84 MB)
• build-artifacts-pr.zip (668 MB)
• build-clr-checked-pr.zip (84 MB)
• diff-frameworks.txt (51 KB)
• jit-diffs-frameworks.zip (256 MB)
• build-logs.txt (1 MB)

[MihuBot]

Top method improvements

-52 (-9.40 % of base) - System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this

 ; Assembly listing for method System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 13 single block inlinees; 7 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T03] (  3,  3   )     ref  ->  rbx         this class-hnd single-def <System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
+;  V00 this         [V00,T04] (  3,  3   )     ref  ->  rbx         this class-hnd single-def <System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;# V01 OutArgs      [V01    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;  V02 tmp1         [V02,T01] (  3,  6   )     ref  ->  r15         class-hnd exact single-def "Single-def Box Helper" <System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;  V03 tmp2         [V03,T02] (  3,  6   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Immutable.DictionaryEnumerator`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;  V04 tmp3         [V04    ] (  4,  8   )  struct (160) [rbp-0xC0]  do-not-enreg[XSF] must-init addr-exposed ld-addr-op "NewObj constructor temp" <System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;  V05 tmp4         [V05,T00] (  4,  7   )     ref  ->  rbx         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;  V06 tmp5         [V06    ] ( 14, 20   )  struct (32) [rbp-0xE0]  do-not-enreg[XS] must-init addr-exposed ld-addr-op "NewObj constructor temp" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;* V07 tmp6         [V07    ] (  0,  0   )   byref  ->  zero-ref   
 ;* V08 tmp7         [V08    ] (  0,  0   )   byref  ->  zero-ref   
 ;* V09 tmp8         [V09    ] (  0,  0   )     int  ->  zero-ref   
 ;* V10 tmp9         [V10    ] (  0,  0   )  struct (32) zero-ref    do-not-enreg[S] "impAppendStmt" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;  V11 tmp10        [V11,T07] (  3,  3   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]>
-;  V12 tmp11        [V12,T05] (  2,  4   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;* V13 tmp12        [V13,T10] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V11 tmp10        [V11,T09] (  3,  3   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]>
+;  V12 tmp11        [V12,T06] (  2,  4   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
+;* V13 tmp12        [V13,T12] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;* V14 tmp13        [V14    ] (  0,  0   )  struct (32) zero-ref    ld-addr-op "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;  V15 tmp14        [V15,T08] (  2,  2   )     ref  ->  rdi         class-hnd exact single-def "impAppendStmt" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
+;  V15 tmp14        [V15,T10] (  2,  2   )     ref  ->  rdi         class-hnd exact single-def "impAppendStmt" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V16 tmp15        [V16    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;* V17 tmp16        [V17    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
-;  V18 tmp17        [V18,T04] (  4,  4   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
+;  V18 tmp17        [V18,T05] (  4,  4   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V19 tmp18        [V19    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V20 tmp19        [V20    ] (  0,  0   )  struct (32) zero-ref    ld-addr-op "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;* V21 tmp20        [V21    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
-;  V22 tmp21        [V22,T06] (  2,  4   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
+;  V22 tmp21        [V22,T07] (  2,  4   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;  V23 tmp22        [V23    ] (  5,  5.50)     ref  ->  [rbp-0xE0]  do-not-enreg[X] addr-exposed "field V06._root (fldOffset=0x0)" P-DEP
 ;  V24 tmp23        [V24    ] (  7,  6   )     ref  ->  [rbp-0xD8]  do-not-enreg[X] addr-exposed "field V06._stack (fldOffset=0x8)" P-DEP
 ;  V25 tmp24        [V25    ] (  3,  4   )     ref  ->  [rbp-0xD0]  do-not-enreg[X] addr-exposed "field V06._current (fldOffset=0x10)" P-DEP
 ;  V26 tmp25        [V26    ] (  5,  5   )     int  ->  [rbp-0xC8]  do-not-enreg[X] addr-exposed "field V06._poolUserId (fldOffset=0x18)" P-DEP
 ;* V27 tmp26        [V27    ] (  0,  0   )     ref  ->  zero-ref    "field V14._root (fldOffset=0x0)" P-INDEP
 ;* V28 tmp27        [V28    ] (  0,  0   )     ref  ->  zero-ref    "field V14._stack (fldOffset=0x8)" P-INDEP
 ;* V29 tmp28        [V29    ] (  0,  0   )     ref  ->  zero-ref    "field V14._current (fldOffset=0x10)" P-INDEP
-;  V30 tmp29        [V30,T09] (  3,  1.50)     int  ->  r14         "field V14._poolUserId (fldOffset=0x18)" P-INDEP
+;  V30 tmp29        [V30,T11] (  3,  1.50)     int  ->  r14         "field V14._poolUserId (fldOffset=0x18)" P-INDEP
 ;* V31 tmp30        [V31    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V20._root (fldOffset=0x0)" P-INDEP
 ;* V32 tmp31        [V32    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V20._stack (fldOffset=0x8)" P-INDEP
 ;* V33 tmp32        [V33    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V20._current (fldOffset=0x10)" P-INDEP
 ;* V34 tmp33        [V34    ] (  0,  0   )     int  ->  zero-ref    "field V20._poolUserId (fldOffset=0x18)" P-INDEP
 ;* V35 tmp34        [V35    ] (  0,  0   )     ref  ->  zero-ref    single-def "V10.[000..008)"
 ;* V36 tmp35        [V36    ] (  0,  0   )     ref  ->  zero-ref    single-def "V10.[008..016)"
 ;* V37 tmp36        [V37    ] (  0,  0   )     ref  ->  zero-ref    single-def "V10.[016..024)"
-;  V38 tmp37        [V38,T11] (  2,  1   )     int  ->  r14         "V10.[024..028)"
+;  V38 tmp37        [V38,T13] (  2,  1   )     int  ->  r14         "V10.[024..028)"
+;  V39 rat0         [V39,T03] (  3,  6   )   byref  ->  rdi         "fgMakeTemp is creating a new local variable"
+;  V40 rat1         [V40,T08] (  2,  4   )   byref  ->  rdi         "argument with side effect"
 ;
 ; Lcl frame size = 192
 
 G_M46956_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     rbx
        sub      rsp, 192
        lea      rbp, [rsp+0xE0]
        vxorps   xmm8, xmm8, xmm8
        mov      rax, -192
        vmovdqa  xmmword ptr [rbp+rax-0x20], xmm8
        vmovdqa  xmmword ptr [rbp+rax-0x10], xmm8
        vmovdqa  xmmword ptr [rax+rbp], xmm8
        add      rax, 48
        jne      SHORT  -5 instr
        mov      rbx, rdi
 						;; size=64 bbWeight=1 PerfScore 13.83
 G_M46956_IG02:
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        mov      rbx, gword ptr [rbx+0x08]
        test     rbx, rbx
        je       G_M46956_IG09
        mov      gword ptr [rbp-0xE0], rbx
        xor      rax, rax
        mov      gword ptr [rbp-0xD0], rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.SecureObjectPool:NewId():int
        call     [rax]System.Collections.Immutable.SecureObjectPool:NewId():int
        mov      dword ptr [rbp-0xC8], eax
        xor      rsi, rsi
        mov      gword ptr [rbp-0xD8], rsi
        mov      rsi, gword ptr [rbp-0xE0]
        cmp      gword ptr [rsi+0x08], 0
        je       G_M46956_IG06
 						;; size=92 bbWeight=1 PerfScore 17.50
 G_M46956_IG03:
        mov      r14d, dword ptr [rbp-0xC8]
        cmp      r14d, -1
        je       SHORT G_M46956_IG04
        lea      rsi, [rbp-0xD8]
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.AllocFreeConcurrentStack`1[System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]]
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.AllocFreeConcurrentStack`1[System.__Canon]:TryTake(byref):ubyte
        call     [rax]System.Collections.Immutable.AllocFreeConcurrentStack`1[System.__Canon]:TryTake(byref):ubyte
        test     eax, eax
        je       SHORT G_M46956_IG04
        mov      rdi, gword ptr [rbp-0xD8]
        mov      dword ptr [rdi+0x10], r14d
        jmp      SHORT G_M46956_IG05
 						;; size=59 bbWeight=0.50 PerfScore 5.75
 G_M46956_IG04:
        xor      rdi, rdi
        mov      gword ptr [rbp-0xD8], rdi
        mov      r14d, dword ptr [rbp-0xC8]
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]
        call     CORINFO_HELP_NEWSFAST
        mov      r13, rax
        movzx    rsi, byte  ptr [rbx+0x1D]
        mov      rdi, r13
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.__Canon]]:.ctor(int):this
        call     [rax]System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.__Canon]]:.ctor(int):this
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]
        call     CORINFO_HELP_NEWSFAST
        mov      rbx, rax
        lea      rdi, bword ptr [rbx+0x08]
        mov      rsi, r13
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x10], r14d
        mov      gword ptr [rbp-0xD8], rbx
 						;; size=95 bbWeight=0.50 PerfScore 7.25
 G_M46956_IG05:
        lea      rdi, [rbp-0xE0]
        mov      rsi, gword ptr [rbp-0xE0]
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:PushLeft(System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]):this
        call     [rax]System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:PushLeft(System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]):this
 						;; size=26 bbWeight=0.50 PerfScore 2.38
 G_M46956_IG06:
        vmovdqu  ymm0, ymmword ptr [rbp-0xE0]
        vmovdqu  ymmword ptr [rbp-0xB0], ymm0
 						;; size=16 bbWeight=1 PerfScore 5.00
 G_M46956_IG07:
        vxorps   ymm0, ymm0, ymm0
        vmovdqu  ymmword ptr [rbp-0x90], ymm0
        vmovdqu  ymmword ptr [rbp-0x70], ymm0
        vmovdqu  ymmword ptr [rbp-0x50], ymm0
        vmovdqu  xmmword ptr [rbp-0x30], xmm0
        mov      dword ptr [rbp-0xB8], -1
        lea      rdi, bword ptr [r15+0x08]
-       lea      rsi, bword ptr [rbp-0xC0]
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       movsq    
-       call     CORINFO_HELP_ASSIGN_BYREF
-       mov      ecx, 5
-       rep movsq 
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       movsq    
-       movsq    
+       cmp      byte  ptr [rdi], dil
+       lea      rsi, [rbp-0xC0]
+       mov      edx, 72
+       call     CORINFO_HELP_ASSIGN_STRUCT
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.DictionaryEnumerator`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]
        call     CORINFO_HELP_NEWSFAST
        mov      rbx, rax
        mov      rsi, r15
        lea      rdi, bword ptr [rbx+0x08]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rax, rbx
-						;; size=146 bbWeight=1 PerfScore 50.08
+						;; size=94 bbWeight=1 PerfScore 14.08
 G_M46956_IG08:
        vzeroupper 
        add      rsp, 192
        pop      rbx
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=19 bbWeight=1 PerfScore 4.75
 G_M46956_IG09:
        mov      edi, 0x45F
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.Requires:FailArgumentNullException(System.String)
        call     [rax]System.Collections.Immutable.Requires:FailArgumentNullException(System.String)
        int3     
 						;; size=36 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 553, prolog size 61, PerfScore 106.54, instruction count 115, allocated bytes for code 553 (MethodHash=0c354893) for method System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)
+; Total bytes of code 501, prolog size 61, PerfScore 70.54, instruction count 101, allocated bytes for code 501 (MethodHash=0c354893) for method System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IDictionary.GetEnumerator():System.Collections.IDictionaryEnumerator:this (FullOpts)

-52 (-9.94 % of base) - System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this

 ; Assembly listing for method System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 11 single block inlinees; 6 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T02] (  3,  3   )     ref  ->  rbx         this class-hnd single-def <System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
+;  V00 this         [V00,T03] (  3,  3   )     ref  ->  rbx         this class-hnd single-def <System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;# V01 OutArgs      [V01    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;  V02 tmp1         [V02,T01] (  3,  6   )     ref  ->  r15         class-hnd exact single-def "Single-def Box Helper" <System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;  V03 tmp2         [V03    ] (  4,  8   )  struct (160) [rbp-0xC0]  do-not-enreg[XSF] must-init addr-exposed ld-addr-op "NewObj constructor temp" <System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;  V04 tmp3         [V04,T00] (  4,  7   )     ref  ->  rbx         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;  V05 tmp4         [V05    ] ( 14, 20   )  struct (32) [rbp-0xE0]  do-not-enreg[XS] must-init addr-exposed ld-addr-op "NewObj constructor temp" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;* V06 tmp5         [V06    ] (  0,  0   )   byref  ->  zero-ref   
 ;* V07 tmp6         [V07    ] (  0,  0   )   byref  ->  zero-ref   
 ;* V08 tmp7         [V08    ] (  0,  0   )     int  ->  zero-ref   
 ;* V09 tmp8         [V09    ] (  0,  0   )  struct (32) zero-ref    do-not-enreg[S] "impAppendStmt" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;  V10 tmp9         [V10,T05] (  3,  3   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]>
-;  V11 tmp10        [V11,T04] (  2,  4   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;* V12 tmp11        [V12,T08] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V10 tmp9         [V10,T07] (  3,  3   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]>
+;  V11 tmp10        [V11,T05] (  2,  4   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
+;* V12 tmp11        [V12,T10] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;* V13 tmp12        [V13    ] (  0,  0   )  struct (32) zero-ref    ld-addr-op "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;  V14 tmp13        [V14,T06] (  2,  2   )     ref  ->  rdi         class-hnd exact single-def "impAppendStmt" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
+;  V14 tmp13        [V14,T08] (  2,  2   )     ref  ->  rdi         class-hnd exact single-def "impAppendStmt" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V15 tmp14        [V15    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;* V16 tmp15        [V16    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
-;  V17 tmp16        [V17,T03] (  4,  4   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
+;  V17 tmp16        [V17,T04] (  4,  4   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V18 tmp17        [V18    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V19 tmp18        [V19    ] (  0,  0   )  struct (32) zero-ref    ld-addr-op "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;* V20 tmp19        [V20    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;  V21 tmp20        [V21    ] (  5,  5.50)     ref  ->  [rbp-0xE0]  do-not-enreg[X] addr-exposed "field V05._root (fldOffset=0x0)" P-DEP
 ;  V22 tmp21        [V22    ] (  7,  6   )     ref  ->  [rbp-0xD8]  do-not-enreg[X] addr-exposed "field V05._stack (fldOffset=0x8)" P-DEP
 ;  V23 tmp22        [V23    ] (  3,  4   )     ref  ->  [rbp-0xD0]  do-not-enreg[X] addr-exposed "field V05._current (fldOffset=0x10)" P-DEP
 ;  V24 tmp23        [V24    ] (  5,  5   )     int  ->  [rbp-0xC8]  do-not-enreg[X] addr-exposed "field V05._poolUserId (fldOffset=0x18)" P-DEP
 ;* V25 tmp24        [V25    ] (  0,  0   )     ref  ->  zero-ref    "field V13._root (fldOffset=0x0)" P-INDEP
 ;* V26 tmp25        [V26    ] (  0,  0   )     ref  ->  zero-ref    "field V13._stack (fldOffset=0x8)" P-INDEP
 ;* V27 tmp26        [V27    ] (  0,  0   )     ref  ->  zero-ref    "field V13._current (fldOffset=0x10)" P-INDEP
-;  V28 tmp27        [V28,T07] (  3,  1.50)     int  ->  r14         "field V13._poolUserId (fldOffset=0x18)" P-INDEP
+;  V28 tmp27        [V28,T09] (  3,  1.50)     int  ->  r14         "field V13._poolUserId (fldOffset=0x18)" P-INDEP
 ;* V29 tmp28        [V29    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V19._root (fldOffset=0x0)" P-INDEP
 ;* V30 tmp29        [V30    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V19._stack (fldOffset=0x8)" P-INDEP
 ;* V31 tmp30        [V31    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V19._current (fldOffset=0x10)" P-INDEP
 ;* V32 tmp31        [V32    ] (  0,  0   )     int  ->  zero-ref    "field V19._poolUserId (fldOffset=0x18)" P-INDEP
 ;* V33 tmp32        [V33    ] (  0,  0   )     ref  ->  zero-ref    single-def "V09.[000..008)"
 ;* V34 tmp33        [V34    ] (  0,  0   )     ref  ->  zero-ref    single-def "V09.[008..016)"
 ;* V35 tmp34        [V35    ] (  0,  0   )     ref  ->  zero-ref    single-def "V09.[016..024)"
-;  V36 tmp35        [V36,T09] (  2,  1   )     int  ->  r14         "V09.[024..028)"
+;  V36 tmp35        [V36,T11] (  2,  1   )     int  ->  r14         "V09.[024..028)"
+;  V37 rat0         [V37,T02] (  3,  6   )   byref  ->  rdi         "fgMakeTemp is creating a new local variable"
+;  V38 rat1         [V38,T06] (  2,  4   )   byref  ->  rdi         "argument with side effect"
 ;
 ; Lcl frame size = 192
 
 G_M12866_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     rbx
        sub      rsp, 192
        lea      rbp, [rsp+0xE0]
        vxorps   xmm8, xmm8, xmm8
        mov      rax, -192
        vmovdqa  xmmword ptr [rbp+rax-0x20], xmm8
        vmovdqa  xmmword ptr [rbp+rax-0x10], xmm8
        vmovdqa  xmmword ptr [rax+rbp], xmm8
        add      rax, 48
        jne      SHORT  -5 instr
        mov      rbx, rdi
 						;; size=64 bbWeight=1 PerfScore 13.83
 G_M12866_IG02:
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        mov      rbx, gword ptr [rbx+0x08]
        test     rbx, rbx
        je       G_M12866_IG09
        mov      gword ptr [rbp-0xE0], rbx
        xor      rax, rax
        mov      gword ptr [rbp-0xD0], rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.SecureObjectPool:NewId():int
        call     [rax]System.Collections.Immutable.SecureObjectPool:NewId():int
        mov      dword ptr [rbp-0xC8], eax
        xor      rsi, rsi
        mov      gword ptr [rbp-0xD8], rsi
        mov      rsi, gword ptr [rbp-0xE0]
        cmp      gword ptr [rsi+0x08], 0
        je       G_M12866_IG06
 						;; size=92 bbWeight=1 PerfScore 17.50
 G_M12866_IG03:
        mov      r14d, dword ptr [rbp-0xC8]
        cmp      r14d, -1
        je       SHORT G_M12866_IG04
        lea      rsi, [rbp-0xD8]
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.AllocFreeConcurrentStack`1[System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]]
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.AllocFreeConcurrentStack`1[System.__Canon]:TryTake(byref):ubyte
        call     [rax]System.Collections.Immutable.AllocFreeConcurrentStack`1[System.__Canon]:TryTake(byref):ubyte
        test     eax, eax
        je       SHORT G_M12866_IG04
        mov      rdi, gword ptr [rbp-0xD8]
        mov      dword ptr [rdi+0x10], r14d
        jmp      SHORT G_M12866_IG05
 						;; size=59 bbWeight=0.50 PerfScore 5.75
 G_M12866_IG04:
        xor      rdi, rdi
        mov      gword ptr [rbp-0xD8], rdi
        mov      r14d, dword ptr [rbp-0xC8]
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]
        call     CORINFO_HELP_NEWSFAST
        mov      r13, rax
        movzx    rsi, byte  ptr [rbx+0x1D]
        mov      rdi, r13
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.__Canon]]:.ctor(int):this
        call     [rax]System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.__Canon]]:.ctor(int):this
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]
        call     CORINFO_HELP_NEWSFAST
        mov      rbx, rax
        lea      rdi, bword ptr [rbx+0x08]
        mov      rsi, r13
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x10], r14d
        mov      gword ptr [rbp-0xD8], rbx
 						;; size=95 bbWeight=0.50 PerfScore 7.25
 G_M12866_IG05:
        lea      rdi, [rbp-0xE0]
        mov      rsi, gword ptr [rbp-0xE0]
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:PushLeft(System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]):this
        call     [rax]System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:PushLeft(System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]):this
 						;; size=26 bbWeight=0.50 PerfScore 2.38
 G_M12866_IG06:
        vmovdqu  ymm0, ymmword ptr [rbp-0xE0]
        vmovdqu  ymmword ptr [rbp-0xB0], ymm0
 						;; size=16 bbWeight=1 PerfScore 5.00
 G_M12866_IG07:
        vxorps   ymm0, ymm0, ymm0
        vmovdqu  ymmword ptr [rbp-0x90], ymm0
        vmovdqu  ymmword ptr [rbp-0x70], ymm0
        vmovdqu  ymmword ptr [rbp-0x50], ymm0
        vmovdqu  xmmword ptr [rbp-0x30], xmm0
        mov      dword ptr [rbp-0xB8], -1
        lea      rdi, bword ptr [r15+0x08]
-       lea      rsi, bword ptr [rbp-0xC0]
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       movsq    
-       call     CORINFO_HELP_ASSIGN_BYREF
-       mov      ecx, 5
-       rep movsq 
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       movsq    
-       movsq    
+       cmp      byte  ptr [rdi], dil
+       lea      rsi, [rbp-0xC0]
+       mov      edx, 72
+       call     CORINFO_HELP_ASSIGN_STRUCT
        mov      rax, r15
-						;; size=116 bbWeight=1 PerfScore 46.83
+						;; size=64 bbWeight=1 PerfScore 10.83
 G_M12866_IG08:
        vzeroupper 
        add      rsp, 192
        pop      rbx
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=19 bbWeight=1 PerfScore 4.75
 G_M12866_IG09:
        mov      edi, 0x45F
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.Requires:FailArgumentNullException(System.String)
        call     [rax]System.Collections.Immutable.Requires:FailArgumentNullException(System.String)
        int3     
 						;; size=36 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 523, prolog size 61, PerfScore 103.29, instruction count 109, allocated bytes for code 523 (MethodHash=8ba9cdbd) for method System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
+; Total bytes of code 471, prolog size 61, PerfScore 67.29, instruction count 95, allocated bytes for code 471 (MethodHash=8ba9cdbd) for method System.Collections.Immutable.ImmutableDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)

-52 (-9.35 % of base) - System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:this

 ; Assembly listing for method System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 12 single block inlinees; 6 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] (  5,  5   )     ref  ->  rbx         this class-hnd single-def <System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;# V01 OutArgs      [V01    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;  V02 tmp1         [V02,T02] (  3,  6   )     ref  ->  r15         class-hnd exact single-def "Single-def Box Helper" <System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;  V03 tmp2         [V03    ] (  5, 10   )  struct (160) [rbp-0xC8]  do-not-enreg[XSF] must-init addr-exposed ld-addr-op "NewObj constructor temp" <System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]>
 ;  V04 tmp3         [V04,T01] (  4,  7   )     ref  ->  r14         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;  V05 tmp4         [V05    ] ( 14, 20   )  struct (32) [rbp-0xE8]  do-not-enreg[XS] must-init addr-exposed ld-addr-op "NewObj constructor temp" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;* V06 tmp5         [V06    ] (  0,  0   )   byref  ->  zero-ref   
-;  V07 tmp6         [V07,T06] (  2,  2   )   byref  ->  rcx         single-def
-;  V08 tmp7         [V08,T08] (  2,  2   )     int  ->  rdi        
+;  V07 tmp6         [V07,T08] (  2,  2   )   byref  ->  rdi         single-def
+;  V08 tmp7         [V08,T10] (  2,  2   )     int  ->  rsi        
 ;* V09 tmp8         [V09    ] (  0,  0   )  struct (32) zero-ref    do-not-enreg[S] "impAppendStmt" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;  V10 tmp9         [V10,T05] (  3,  3   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]>
-;  V11 tmp10        [V11,T04] (  2,  4   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;* V12 tmp11        [V12,T10] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V10 tmp9         [V10,T07] (  3,  3   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]>
+;  V11 tmp10        [V11,T05] (  2,  4   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
+;* V12 tmp11        [V12,T12] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;* V13 tmp12        [V13    ] (  0,  0   )  struct (32) zero-ref    ld-addr-op "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
-;  V14 tmp13        [V14,T07] (  2,  2   )     ref  ->  rdi         class-hnd exact single-def "impAppendStmt" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
+;  V14 tmp13        [V14,T09] (  2,  2   )     ref  ->  rdi         class-hnd exact single-def "impAppendStmt" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V15 tmp14        [V15    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;* V16 tmp15        [V16    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
-;  V17 tmp16        [V17,T03] (  4,  4   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
+;  V17 tmp16        [V17,T04] (  4,  4   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V18 tmp17        [V18    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]>
 ;* V19 tmp18        [V19    ] (  0,  0   )  struct (32) zero-ref    ld-addr-op "Inlining Arg" <System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]>
 ;* V20 tmp19        [V20    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;  V21 tmp20        [V21    ] (  5,  5.50)     ref  ->  [rbp-0xE8]  do-not-enreg[X] addr-exposed "field V05._root (fldOffset=0x0)" P-DEP
 ;  V22 tmp21        [V22    ] (  7,  6   )     ref  ->  [rbp-0xE0]  do-not-enreg[X] addr-exposed "field V05._stack (fldOffset=0x8)" P-DEP
 ;  V23 tmp22        [V23    ] (  3,  4   )     ref  ->  [rbp-0xD8]  do-not-enreg[X] addr-exposed "field V05._current (fldOffset=0x10)" P-DEP
 ;  V24 tmp23        [V24    ] (  5,  5   )     int  ->  [rbp-0xD0]  do-not-enreg[X] addr-exposed "field V05._poolUserId (fldOffset=0x18)" P-DEP
 ;* V25 tmp24        [V25    ] (  0,  0   )     ref  ->  zero-ref    "field V13._root (fldOffset=0x0)" P-INDEP
 ;* V26 tmp25        [V26    ] (  0,  0   )     ref  ->  zero-ref    "field V13._stack (fldOffset=0x8)" P-INDEP
 ;* V27 tmp26        [V27    ] (  0,  0   )     ref  ->  zero-ref    "field V13._current (fldOffset=0x10)" P-INDEP
-;  V28 tmp27        [V28,T09] (  3,  1.50)     int  ->  r13         "field V13._poolUserId (fldOffset=0x18)" P-INDEP
+;  V28 tmp27        [V28,T11] (  3,  1.50)     int  ->  r13         "field V13._poolUserId (fldOffset=0x18)" P-INDEP
 ;* V29 tmp28        [V29    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V19._root (fldOffset=0x0)" P-INDEP
 ;* V30 tmp29        [V30    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V19._stack (fldOffset=0x8)" P-INDEP
 ;* V31 tmp30        [V31    ] (  0,  0   )     ref  ->  zero-ref    single-def "field V19._current (fldOffset=0x10)" P-INDEP
 ;* V32 tmp31        [V32    ] (  0,  0   )     int  ->  zero-ref    "field V19._poolUserId (fldOffset=0x18)" P-INDEP
 ;* V33 tmp32        [V33    ] (  0,  0   )     ref  ->  zero-ref    single-def "V09.[000..008)"
 ;* V34 tmp33        [V34    ] (  0,  0   )     ref  ->  zero-ref    single-def "V09.[008..016)"
 ;* V35 tmp34        [V35    ] (  0,  0   )     ref  ->  zero-ref    single-def "V09.[016..024)"
-;  V36 tmp35        [V36,T11] (  2,  1   )     int  ->  r13         "V09.[024..028)"
+;  V36 tmp35        [V36,T13] (  2,  1   )     int  ->  r13         "V09.[024..028)"
+;  V37 rat0         [V37,T03] (  3,  6   )   byref  ->  rdi         "fgMakeTemp is creating a new local variable"
+;  V38 rat1         [V38,T06] (  2,  4   )   byref  ->  rdi         "argument with side effect"
 ;
 ; Lcl frame size = 200
 
 G_M25738_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 200
        lea      rbp, [rsp+0xF0]
        xor      eax, eax
        mov      qword ptr [rbp-0xE8], rax
        vxorps   xmm8, xmm8, xmm8
        vmovdqu  ymmword ptr [rbp-0xE0], ymm8
        vmovdqu  ymmword ptr [rbp-0xC0], ymm8
        vmovdqu  ymmword ptr [rbp-0xA0], ymm8
        vmovdqu  ymmword ptr [rbp-0x80], ymm8
        vmovdqu  ymmword ptr [rbp-0x60], ymm8
        vmovdqa  xmmword ptr [rbp-0x40], xmm8
        mov      qword ptr [rbp-0x30], rax
        mov      rbx, rdi
 						;; size=85 bbWeight=1 PerfScore 21.58
 G_M25738_IG02:
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.ImmutableDictionary`2+Enumerator[System.Numerics.Vector`1[float],System.Nullable`1[int]]
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        mov      r14, gword ptr [rbx+0x08]
        mov      gword ptr [rbp-0xC8], rbx
        test     r14, r14
        je       G_M25738_IG09
        mov      gword ptr [rbp-0xE8], r14
        xor      rax, rax
        mov      gword ptr [rbp-0xD8], rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.SecureObjectPool:NewId():int
        call     [rax]System.Collections.Immutable.SecureObjectPool:NewId():int
        mov      dword ptr [rbp-0xD0], eax
        xor      rsi, rsi
        mov      gword ptr [rbp-0xE0], rsi
        mov      rsi, gword ptr [rbp-0xE8]
        cmp      gword ptr [rsi+0x08], 0
        je       G_M25738_IG06
 						;; size=99 bbWeight=1 PerfScore 18.50
 G_M25738_IG03:
        mov      r13d, dword ptr [rbp-0xD0]
        cmp      r13d, -1
        je       SHORT G_M25738_IG04
        lea      rsi, [rbp-0xE0]
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.AllocFreeConcurrentStack`1[System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]]
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.AllocFreeConcurrentStack`1[System.__Canon]:TryTake(byref):ubyte
        call     [rax]System.Collections.Immutable.AllocFreeConcurrentStack`1[System.__Canon]:TryTake(byref):ubyte
        test     eax, eax
        je       SHORT G_M25738_IG04
        mov      rdi, gword ptr [rbp-0xE0]
        mov      dword ptr [rdi+0x10], r13d
        jmp      SHORT G_M25738_IG05
 						;; size=59 bbWeight=0.50 PerfScore 5.75
 G_M25738_IG04:
        xor      rdi, rdi
        mov      gword ptr [rbp-0xE0], rdi
        mov      r13d, dword ptr [rbp-0xD0]
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]
        call     CORINFO_HELP_NEWSFAST
        mov      r12, rax
        movzx    rsi, byte  ptr [r14+0x1D]
        mov      rdi, r12
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.__Canon]]:.ctor(int):this
        call     [rax]System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.__Canon]]:.ctor(int):this
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Immutable.SecurePooledObject`1[System.Collections.Generic.Stack`1[System.Collections.Immutable.RefAsValueType`1[System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]]]]
        call     CORINFO_HELP_NEWSFAST
        mov      r14, rax
        lea      rdi, bword ptr [r14+0x08]
        mov      rsi, r12
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [r14+0x10], r13d
        mov      gword ptr [rbp-0xE0], r14
 						;; size=95 bbWeight=0.50 PerfScore 7.25
 G_M25738_IG05:
        lea      rdi, [rbp-0xE8]
        mov      rsi, gword ptr [rbp-0xE8]
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:PushLeft(System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]):this
        call     [rax]System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:PushLeft(System.Collections.Immutable.SortedInt32KeyNode`1[System.Collections.Immutable.ImmutableDictionary`2+HashBucket[System.Numerics.Vector`1[float],System.Nullable`1[int]]]):this
 						;; size=26 bbWeight=0.50 PerfScore 2.38
 G_M25738_IG06:
        vmovdqu  ymm0, ymmword ptr [rbp-0xE8]
        vmovdqu  ymmword ptr [rbp-0xB8], ymm0
 						;; size=16 bbWeight=1 PerfScore 5.00
 G_M25738_IG07:
        vxorps   ymm0, ymm0, ymm0
        vmovdqu  ymmword ptr [rbp-0x98], ymm0
        vmovdqu  ymmword ptr [rbp-0x78], ymm0
        vmovdqu  ymmword ptr [rbp-0x58], ymm0
        vmovdqu  xmmword ptr [rbp-0x38], xmm0
-       lea      rcx, bword ptr [rbp-0xC8]
-       mov      edi, dword ptr [rbx+0x2C]
-       mov      dword ptr [rcx+0x08], edi
+       lea      rdi, bword ptr [rbp-0xC8]
+       mov      esi, dword ptr [rbx+0x2C]
+       mov      dword ptr [rdi+0x08], esi
        lea      rdi, bword ptr [r15+0x08]
-       lea      rsi, bword ptr [rbp-0xC8]
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       movsq    
-       call     CORINFO_HELP_ASSIGN_BYREF
-       mov      ecx, 5
-       rep movsq 
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       call     CORINFO_HELP_ASSIGN_BYREF
-       movsq    
-       movsq    
-       movsq    
+       cmp      byte  ptr [rdi], dil
+       lea      rsi, [rbp-0xC8]
+       mov      edx, 72
+       call     CORINFO_HELP_ASSIGN_STRUCT
        mov      rax, r15
-						;; size=119 bbWeight=1 PerfScore 49.33
+						;; size=67 bbWeight=1 PerfScore 13.33
 G_M25738_IG08:
        vzeroupper 
        add      rsp, 200
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=21 bbWeight=1 PerfScore 5.25
 G_M25738_IG09:
        mov      edi, 0x45F
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Immutable.Requires:FailArgumentNullException(System.String)
        call     [rax]System.Collections.Immutable.Requires:FailArgumentNullException(System.String)
        int3     
 						;; size=36 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 556, prolog size 82, PerfScore 115.04, instruction count 117, allocated bytes for code 556 (MethodHash=b1859b75) for method System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:this (FullOpts)
+; Total bytes of code 504, prolog size 82, PerfScore 79.04, instruction count 103, allocated bytes for code 504 (MethodHash=b1859b75) for method System.Collections.Immutable.ImmutableDictionary`2+Builder[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:this (FullOpts)

Larger list of diffs: https://gist.github.com/MihuBot/9664169c61236544050564bd3af95e49

[MihuBot]

@EgorBo