[Perf] Windows/x64: 4 Regressions on 7/29/2025 4:24:24 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d](https://github.com/dotnet/runtime/commit/2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d)
Compare | [97d94229eb62859038cd05fb864fd39e9be0a1a0](https://github.com/dotnet/runtime/commit/97d94229eb62859038cd05fb864fd39e9be0a1a0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d...97d94229eb62859038cd05fb864fd39e9be0a1a0)
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>[LastIndexOf_Word_NotFound - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options%3a%20(%2c%20IgnoreCase%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> | 564.44 ns | 994.00 ns | 1.76 | 0.24 | False | | |
|<ul><li>[LastIndexOf_Word_NotFound - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options%3a%20(en-US%2c%20IgnoreCase%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> | 855.98 ns | 993.87 ns | 1.16 | 0.27 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Globalization.Tests.StringSearch_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Globalization.Tests.StringSearch_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_Windows%2010.0.22621_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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Globalization.Tests.StringSearch*'
```

<details>

### System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options: (, IgnoreCase, False))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options: (en-US, IgnoreCase, 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 | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d](https://github.com/dotnet/runtime/commit/2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d)
Compare | [97d94229eb62859038cd05fb864fd39e9be0a1a0](https://github.com/dotnet/runtime/commit/97d94229eb62859038cd05fb864fd39e9be0a1a0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d...97d94229eb62859038cd05fb864fd39e9be0a1a0)
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>[Where01LinqMethodNestedX - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/LinqBenchmarks.Where01LinqMethodNestedX.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/runtime/Linq/Linq.cs#L236-#L252>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 289.65 ms | 314.70 ms | 1.09 | 0.00 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/LinqBenchmarks_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_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.Where01LinqMethodNestedX

#### 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 | [2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d](https://github.com/dotnet/runtime/commit/2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d)
Compare | [97d94229eb62859038cd05fb864fd39e9be0a1a0](https://github.com/dotnet/runtime/commit/97d94229eb62859038cd05fb864fd39e9be0a1a0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d...97d94229eb62859038cd05fb864fd39e9be0a1a0)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.Perf_DefaultFrozenDictionary

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_Windows 10.0.22621/System.Collections.Perf_DefaultFrozenDictionary.TryGetValue_False_FrozenDictionary(Count%3a%2010).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 52.19 ns | 55.52 ns | 1.06 | 0.24 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.Perf_DefaultFrozenDictionary_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_05_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.Perf_DefaultFrozenDictionary.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.Collections.Perf_DefaultFrozenDictionary*'
```

<details>

### System.Collections.Perf_DefaultFrozenDictionary.TryGetValue_False_FrozenDictionary(Count: 10)

#### 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	2bbb5f1dfd3b5d575deef58d0751fbbf00714c0d
Compare	97d94229eb62859038cd05fb864fd39e9be0a1a0
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
LastIndexOf_Word_NotFound - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	564.44 ns	994.00 ns	1.76	0.24	False
LastIndexOf_Word_NotFound - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	855.98 ns	993.87 ns	1.16	0.27	False

[Perf] Windows/x64: 4 Regressions on 7/29/2025 4:24:24 PM +00:00 #60052

Description

Run Information

Regressions in System.Globalization.Tests.StringSearch

Repro

System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options: (, IgnoreCase, False))

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in LinqBenchmarks

Repro

LinqBenchmarks.Where01LinqMethodNestedX

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.Perf_DefaultFrozenDictionary

Repro

System.Collections.Perf_DefaultFrozenDictionary.TryGetValue_False_FrozenDictionary(Count: 10)

ETL Files

Histogram

JIT Disasms

Docs

Metadata

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