[Perf] Windows/x64: 5 Regressions on 8/6/2025 9:48:06 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785](https://github.com/dotnet/runtime/commit/e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785)
Compare | [386cb8d92b2ff53b54ec8572132215c78b2d0f00](https://github.com/dotnet/runtime/commit/386cb8d92b2ff53b54ec8572132215c78b2d0f00)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785...386cb8d92b2ff53b54ec8572132215c78b2d0f00)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Linq.Tests.Perf_Enumerable

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[WhereSingleOrDefault_LastElementMatches - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Linq.Tests.Perf_Enumerable.WhereSingleOrDefault_LastElementMatches(input%3a%20List).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L130-#L132>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 249.58 ns | 279.34 ns | 1.12 | 0.00 | False | | |
|<ul><li>[WhereSingle_LastElementMatches - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Linq.Tests.Perf_Enumerable.WhereSingle_LastElementMatches(input%3a%20List).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L124-#L126>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 251.31 ns | 279.59 ns | 1.11 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_12_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Linq.Tests.Perf_Enumerable_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_12_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Linq.Tests.Perf_Enumerable_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_12_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Linq.Tests.Perf_Enumerable.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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Linq.Tests.Perf_Enumerable*'
```

<details>

### System.Linq.Tests.Perf_Enumerable.WhereSingleOrDefault_LastElementMatches(input: List)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Linq.Tests.Perf_Enumerable.WhereSingle_LastElementMatches(input: List)

#### 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 | Windows 10.0.22621
Queue | TigerWindows
Baseline | [e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785](https://github.com/dotnet/runtime/commit/e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785)
Compare | [386cb8d92b2ff53b54ec8572132215c78b2d0f00](https://github.com/dotnet/runtime/commit/386cb8d92b2ff53b54ec8572132215c78b2d0f00)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785...386cb8d92b2ff53b54ec8572132215c78b2d0f00)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in Benchstone.MDBenchI.MDGeneralArray

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Test2 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/Benchstone.MDBenchI.MDGeneralArray.Test2.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/runtime/Benchstones/MDBenchI/MDGeneralArray.cs#L69-#L77>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1Ry27bMBC8G/A/bH2hjSqWrNRN4IBA80JaFL4kRntmxZXFgCINctXYaPrvXUrypZelSM0MZ4YWCQgjgYQv4g5d1UTyDpfbh37zjT+e0GFQ9jYEdVruGFuKm+nEMlHVhIGZWhGSaXFeFuX6ovh8sSp3q+vNZbm5XC/XV+tPq6L8WBSboliMzIAHz0ShPTmkPHQu8c+6v4Liu9P/gHXMG1Q65q0y7gyovKvNPt18cqo11fyPuPftwVhFxrut1yg2IMhgQC0yEM+d+26cToeMDl78TUaekL4ajhtMpeyDIvXTUJN0VDDRuzhPxcg0siGq7GfWu5dpZKNVOSzZaEwOy2I6eYdD8K9YEbxgMBgzuOuM1TsO+0KqPWTwQ9kOZar13nMLGJ4xdpZuf3Pne5xO8vwd3hoOMirABxYn7iLCbEb+8VjZTuNsBnkOj0eWtAi+htpY1jJuD77jh4LYk5OhgE7zq6W+q0YFgjdODfMBIM82j5W3Xevk/3ZPw3mUvW/GkSGLUnB9yE2fxu0WVewCtuhILP4BCdLMbmQCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 16.35 ms | 17.61 ms | 1.08 | 0.10 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_12_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/Benchstone.MDBenchI.MDGeneralArray_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_12_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/Benchstone.MDBenchI.MDGeneralArray.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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'Benchstone.MDBenchI.MDGeneralArray*'
```

<details>

### Benchstone.MDBenchI.MDGeneralArray.Test2

#### 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 | Windows 10.0.22621
Queue | TigerWindows
Baseline | [e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785](https://github.com/dotnet/runtime/commit/e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785)
Compare | [386cb8d92b2ff53b54ec8572132215c78b2d0f00](https://github.com/dotnet/runtime/commit/386cb8d92b2ff53b54ec8572132215c78b2d0f00)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785...386cb8d92b2ff53b54ec8572132215c78b2d0f00)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in LinqBenchmarks

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Where01LinqQueryX - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/LinqBenchmarks.Where01LinqQueryX.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/runtime/Linq/Linq.cs#L195-#L215>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 145.97 ms | 168.11 ms | 1.15 | 0.15 | False | | |
|<ul><li>[Where01LinqMethodX - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/LinqBenchmarks.Where01LinqMethodX.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/runtime/Linq/Linq.cs#L217-#L234>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 147.50 ms | 168.38 ms | 1.14 | 0.14 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_12_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/LinqBenchmarks_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_12_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/LinqBenchmarks_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_12_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/LinqBenchmarks.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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'LinqBenchmarks*'
```

<details>

### LinqBenchmarks.Where01LinqQueryX

#### ETL Files

#### Histogram

#### JIT Disasms

### LinqBenchmarks.Where01LinqMethodX

#### 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	Windows 10.0.22621
Queue	TigerWindows
Baseline	e7e3cc2eb7a53bbfa90549b6ce6d43f710b9f785
Compare	386cb8d92b2ff53b54ec8572132215c78b2d0f00
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
WhereSingleOrDefault_LastElementMatches - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	249.58 ns	279.34 ns	1.12	0.00	False
WhereSingle_LastElementMatches - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	251.31 ns	279.59 ns	1.11	0.01	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
Where01LinqQueryX - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	145.97 ms	168.11 ms	1.15	0.15	False
Where01LinqMethodX - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	147.50 ms	168.38 ms	1.14	0.14	False

[Perf] Windows/x64: 5 Regressions on 8/6/2025 9:48:06 PM +00:00 #118659

Description

Run Information

Regressions in System.Linq.Tests.Perf_Enumerable

Repro

System.Linq.Tests.Perf_Enumerable.WhereSingleOrDefault_LastElementMatches(input: List)

ETL Files

Histogram

JIT Disasms

System.Linq.Tests.Perf_Enumerable.WhereSingle_LastElementMatches(input: List)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in Benchstone.MDBenchI.MDGeneralArray

Repro

Benchstone.MDBenchI.MDGeneralArray.Test2

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in LinqBenchmarks

Repro

LinqBenchmarks.Where01LinqQueryX

ETL Files

Histogram

JIT Disasms

LinqBenchmarks.Where01LinqMethodX

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Metadata

Assignees

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