[Perf] Linux/arm64: 8 Regressions on 6/14/2024 4:08:00 PM

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [d7ae8c61f0937df4dcffe88ba96eae65fa523a78](https://github.com/dotnet/runtime/commit/d7ae8c61f0937df4dcffe88ba96eae65fa523a78)
Compare | [7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7](https://github.com/dotnet/runtime/commit/7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d7ae8c61f0937df4dcffe88ba96eae65fa523a78...7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Memory.Span&lt;Char&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[SequenceCompareTo - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).SequenceCompareTo(Size%3a%2033).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L55-#L56>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 8.22 ns | 9.39 ns | 1.14 | 0.23 | False | | |
|<ul><li>[Fill - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).Fill(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L43-#L44>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 23.17 ns | 30.08 ns | 1.30 | 0.02 | True | | |
|<ul><li>[Fill - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).Fill(Size%3a%2033).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L43-#L44>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 3.61 ns | 8.69 ns | 2.40 | 0.07 | True | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Char%29_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Char%29_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Char%29_3.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Char%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.Memory.Span&lt;Char&gt;*'
```

<details>

### System.Memory.Span&lt;Char&gt;.SequenceCompareTo(Size: 33)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Char&gt;.Fill(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Char&gt;.Fill(Size: 33)

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [d7ae8c61f0937df4dcffe88ba96eae65fa523a78](https://github.com/dotnet/runtime/commit/d7ae8c61f0937df4dcffe88ba96eae65fa523a78)
Compare | [7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7](https://github.com/dotnet/runtime/commit/7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d7ae8c61f0937df4dcffe88ba96eae65fa523a78...7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Globalization.Tests.StringSearch

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[IsSuffix_DifferentLastChar - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options%3a%20(en-US%2c%20None%2c%20False)).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Globalization/StringSearch.cs#L98-#L100>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 9.59 ns | 11.37 ns | 1.19 | 0.23 | False | | |
|<ul><li>[LastIndexOf_Word_NotFound - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options%3a%20(en-US%2c%20OrdinalIgnoreCase%2c%20False)).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Globalization/StringSearch.cs#L106-#L108>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 813.77 ns | 914.56 ns | 1.12 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Globalization.Tests.StringSearch_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Globalization.Tests.StringSearch_2.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Globalization.Tests.StringSearch.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.Globalization.Tests.StringSearch*'
```

<details>

### System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options: (en-US, None, False))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options: (en-US, OrdinalIgnoreCase, False))

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [d7ae8c61f0937df4dcffe88ba96eae65fa523a78](https://github.com/dotnet/runtime/commit/d7ae8c61f0937df4dcffe88ba96eae65fa523a78)
Compare | [7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7](https://github.com/dotnet/runtime/commit/7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d7ae8c61f0937df4dcffe88ba96eae65fa523a78...7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions 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_arm64_ubuntu 22.04/System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_False_FrozenDictionary(Count%3a%2010%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> | 20.28 ns | 22.88 ns | 1.13 | 0.02 | False | | |
|<ul><li>[TryGetValue_False_FrozenDictionary - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_False_FrozenDictionary(Count%3a%2010%2c%20ItemsPerBucket%3a%205).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 20.24 ns | 22.88 ns | 1.13 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Collections.Perf_LengthBucketsFrozenDictionary_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Collections.Perf_LengthBucketsFrozenDictionary_2.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/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: 10, ItemsPerBucket: 1)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_False_FrozenDictionary(Count: 10, ItemsPerBucket: 5)

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [d7ae8c61f0937df4dcffe88ba96eae65fa523a78](https://github.com/dotnet/runtime/commit/d7ae8c61f0937df4dcffe88ba96eae65fa523a78)
Compare | [7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7](https://github.com/dotnet/runtime/commit/7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d7ae8c61f0937df4dcffe88ba96eae65fa523a78...7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in Microsoft.Extensions.Primitives.StringSegmentBenchmark

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[GetSegmentHashCode - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/Microsoft.Extensions.Primitives.StringSegmentBenchmark.GetSegmentHashCode.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/Microsoft.Extensions.Primitives/StringSegmentBenchmark.cs#L59-#L60>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 14.62 ns | 16.27 ns | 1.11 | 0.18 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/Microsoft.Extensions.Primitives.StringSegmentBenchmark_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_20_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/Microsoft.Extensions.Primitives.StringSegmentBenchmark.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 'Microsoft.Extensions.Primitives.StringSegmentBenchmark*'
```

<details>

### Microsoft.Extensions.Primitives.StringSegmentBenchmark.GetSegmentHashCode

#### 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	arm64
OS	ubuntu 22.04
Queue	AmpereUbuntu
Baseline	d7ae8c61f0937df4dcffe88ba96eae65fa523a78
Compare	7e9cab2bd10c19bbe9a8212ab1071e6d03f729d7
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
SequenceCompareTo - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	8.22 ns	9.39 ns	1.14	0.23	False
Fill - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	23.17 ns	30.08 ns	1.30	0.02	True
Fill - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	3.61 ns	8.69 ns	2.40	0.07	True

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
IsSuffix_DifferentLastChar - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	9.59 ns	11.37 ns	1.19	0.23	False
LastIndexOf_Word_NotFound - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	813.77 ns	914.56 ns	1.12	0.01	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
TryGetValue_False_FrozenDictionary - Duration of single invocation ADX - Test Multi Config Graph	20.28 ns	22.88 ns	1.13	0.02	False
TryGetValue_False_FrozenDictionary - Duration of single invocation ADX - Test Multi Config Graph	20.24 ns	22.88 ns	1.13	0.02	False

[Perf] Linux/arm64: 8 Regressions on 6/14/2024 4:08:00 PM #36654

Description

Run Information

Regressions in System.Memory.Span<Char>

Repro

System.Memory.Span<Char>.SequenceCompareTo(Size: 33)

ETL Files

Histogram

JIT Disasms

System.Memory.Span<Char>.Fill(Size: 512)

ETL Files

Histogram

JIT Disasms

System.Memory.Span<Char>.Fill(Size: 33)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Globalization.Tests.StringSearch

Repro

System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options: (en-US, None, False))

ETL Files

Histogram

JIT Disasms

System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options: (en-US, OrdinalIgnoreCase, False))

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.Perf_LengthBucketsFrozenDictionary

Repro

System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_False_FrozenDictionary(Count: 10, ItemsPerBucket: 1)

ETL Files

Histogram

JIT Disasms

System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_False_FrozenDictionary(Count: 10, ItemsPerBucket: 5)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in Microsoft.Extensions.Primitives.StringSegmentBenchmark

Repro

Microsoft.Extensions.Primitives.StringSegmentBenchmark.GetSegmentHashCode

ETL Files

Histogram

JIT Disasms

Docs

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