[Perf] Linux/x64: 8 Improvements on 7/30/2025 1:53:57 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [913c282fc9fac8cdaf73bfc594672e8635be8509](https://github.com/dotnet/runtime/commit/913c282fc9fac8cdaf73bfc594672e8635be8509)
Compare | [46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c](https://github.com/dotnet/runtime/commit/46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/913c282fc9fac8cdaf73bfc594672e8635be8509...46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.Text.Tests.Perf_StringBuilder

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ctor_capacity - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/ViperUbuntu/System.Text.Tests.Perf_StringBuilder.ctor_capacity(length%3a%20100000).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text/Perf.StringBuilder.cs#L35-#L38>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 10.18 μs | 7.05 μs | 0.69 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Text.Tests.Perf_StringBuilder_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Text.Tests.Perf_StringBuilder.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Tests.Perf_StringBuilder*'
```

<details>

### System.Text.Tests.Perf_StringBuilder.ctor_capacity(length: 100000)

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [97d94229eb62859038cd05fb864fd39e9be0a1a0](https://github.com/dotnet/runtime/commit/97d94229eb62859038cd05fb864fd39e9be0a1a0)
Compare | [b5f8e98f63411ea6a6a974884e039d65c37717b2](https://github.com/dotnet/runtime/commit/b5f8e98f63411ea6a6a974884e039d65c37717b2)
Diff | [Diff](https://github.com/dotnet/runtime/compare/97d94229eb62859038cd05fb864fd39e9be0a1a0...b5f8e98f63411ea6a6a974884e039d65c37717b2)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.Collections.CtorGivenSizeNonGeneric

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Hashtable - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/ViperUbuntu/System.Collections.CtorGivenSizeNonGeneric.Hashtable(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Create/CtorGivenSizeNonGeneric.cs#L19-#L20>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 831.86 ns | 524.18 ns | 0.63 | 0.05 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.CtorGivenSizeNonGeneric_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.CtorGivenSizeNonGeneric.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CtorGivenSizeNonGeneric*'
```

<details>

### System.Collections.CtorGivenSizeNonGeneric.Hashtable(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [913c282fc9fac8cdaf73bfc594672e8635be8509](https://github.com/dotnet/runtime/commit/913c282fc9fac8cdaf73bfc594672e8635be8509)
Compare | [46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c](https://github.com/dotnet/runtime/commit/46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/913c282fc9fac8cdaf73bfc594672e8635be8509...46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.Collections.CtorGivenSize&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Dictionary - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/ViperUbuntu/System.Collections.CtorGivenSize(String).Dictionary(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Create/CtorGivenSize.cs#L30-#L31>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.17 μs | 932.25 ns | 0.79 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.CtorGivenSize%28String%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.CtorGivenSize%28String%29.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CtorGivenSize&lt;String&gt;*'
```

<details>

### System.Collections.CtorGivenSize&lt;String&gt;.Dictionary(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [913c282fc9fac8cdaf73bfc594672e8635be8509](https://github.com/dotnet/runtime/commit/913c282fc9fac8cdaf73bfc594672e8635be8509)
Compare | [46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c](https://github.com/dotnet/runtime/commit/46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/913c282fc9fac8cdaf73bfc594672e8635be8509...46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.Collections.CopyTo&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ReadOnlyMemory - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/ViperUbuntu/System.Collections.CopyTo(Int32).ReadOnlyMemory(Size%3a%202048).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/CopyTo.cs#L48-#L50>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 190.80 ns | 106.02 ns | 0.56 | 0.02 | False | | |
|<ul><li>[ReadOnlySpan - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/ViperUbuntu/System.Collections.CopyTo(Int32).ReadOnlySpan(Size%3a%202048).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/CopyTo.cs#L40-#L42>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 175.19 ns | 90.32 ns | 0.52 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.CopyTo%28Int32%29_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.CopyTo%28Int32%29_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.CopyTo%28Int32%29.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CopyTo&lt;Int32&gt;*'
```

<details>

### System.Collections.CopyTo&lt;Int32&gt;.ReadOnlyMemory(Size: 2048)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.CopyTo&lt;Int32&gt;.ReadOnlySpan(Size: 2048)

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [18ae5dd6c117f3365f7a338b567f5edb9be12051](https://github.com/dotnet/runtime/commit/18ae5dd6c117f3365f7a338b567f5edb9be12051)
Compare | [b5f8e98f63411ea6a6a974884e039d65c37717b2](https://github.com/dotnet/runtime/commit/b5f8e98f63411ea6a6a974884e039d65c37717b2)
Diff | [Diff](https://github.com/dotnet/runtime/compare/18ae5dd6c117f3365f7a338b567f5edb9be12051...b5f8e98f63411ea6a6a974884e039d65c37717b2)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.Collections.Perf_LengthBucketsFrozenDictionary

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[TryGetValue_False_FrozenDictionary - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/ViperUbuntu/System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_False_FrozenDictionary(Count%3a%2010000%2c%20ItemsPerBucket%3a%201).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 183.65 μs | 155.53 μs | 0.85 | 0.08 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.Perf_LengthBucketsFrozenDictionary_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Collections.Perf_LengthBucketsFrozenDictionary.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.Perf_LengthBucketsFrozenDictionary*'
```

<details>

### System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_False_FrozenDictionary(Count: 10000, ItemsPerBucket: 1)

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [97d94229eb62859038cd05fb864fd39e9be0a1a0](https://github.com/dotnet/runtime/commit/97d94229eb62859038cd05fb864fd39e9be0a1a0)
Compare | [46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c](https://github.com/dotnet/runtime/commit/46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/97d94229eb62859038cd05fb864fd39e9be0a1a0...46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.Text.Perf_Utf8Encoding

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[GetString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/ViperUbuntu/System.Text.Perf_Utf8Encoding.GetString(Input%3a%20EnglishMostlyAscii).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.Encoding/Perf.Utf8Encoding.cs#L33-#L34>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 78.55 μs | 71.34 μs | 0.91 | 0.00 | False | | |
|<ul><li>[GetString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/ViperUbuntu/System.Text.Perf_Utf8Encoding.GetString(Input%3a%20EnglishAllAscii).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.Encoding/Perf.Utf8Encoding.cs#L33-#L34>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 81.24 μs | 74.18 μs | 0.91 | 0.04 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Text.Perf_Utf8Encoding_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Text.Perf_Utf8Encoding_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro/ViperUbuntu_Improvement/System.Text.Perf_Utf8Encoding.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Perf_Utf8Encoding*'
```

<details>

### System.Text.Perf_Utf8Encoding.GetString(Input: EnglishMostlyAscii)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Perf_Utf8Encoding.GetString(Input: EnglishAllAscii)

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>

Name	Value
Architecture	x64
OS	ubuntu 22.04
Queue	ViperUbuntu
Baseline	913c282fc9fac8cdaf73bfc594672e8635be8509
Compare	46ead2636dc4a6aa8ee973b41a96cdaa7e567e1c
Diff	Diff
Configs	AOT:true, CompilationMode:wasm, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ReadOnlyMemory - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	190.80 ns	106.02 ns	0.56	0.02	False
ReadOnlySpan - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	175.19 ns	90.32 ns	0.52	0.03	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
GetString - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	78.55 μs	71.34 μs	0.91	0.00	False
GetString - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	81.24 μs	74.18 μs	0.91	0.04	False

[Perf] Linux/x64: 8 Improvements on 7/30/2025 1:53:57 PM +00:00 #60038

Description

Run Information

Improvements in System.Text.Tests.Perf_StringBuilder

Repro

System.Text.Tests.Perf_StringBuilder.ctor_capacity(length: 100000)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Collections.CtorGivenSizeNonGeneric

Repro

System.Collections.CtorGivenSizeNonGeneric.Hashtable(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Collections.CtorGivenSize<String>

Repro

System.Collections.CtorGivenSize<String>.Dictionary(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Collections.CopyTo<Int32>

Repro

System.Collections.CopyTo<Int32>.ReadOnlyMemory(Size: 2048)

ETL Files

Histogram

JIT Disasms

System.Collections.CopyTo<Int32>.ReadOnlySpan(Size: 2048)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Collections.Perf_LengthBucketsFrozenDictionary

Repro

System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_False_FrozenDictionary(Count: 10000, ItemsPerBucket: 1)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Text.Perf_Utf8Encoding

Repro

System.Text.Perf_Utf8Encoding.GetString(Input: EnglishMostlyAscii)

ETL Files

Histogram

JIT Disasms

System.Text.Perf_Utf8Encoding.GetString(Input: EnglishAllAscii)

ETL Files

Histogram

JIT Disasms

Docs

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