[Perf] Windows/x64: 7 Regressions on 5/16/2025 10:16:17 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [2f8f6e71c8e9216840c7f80fb71c545e1cdac580](https://github.com/dotnet/runtime/commit/2f8f6e71c8e9216840c7f80fb71c545e1cdac580)
Compare | [e2ad5fcc1702105d9cb9c32802181976df1b97ba](https://github.com/dotnet/runtime/commit/e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2f8f6e71c8e9216840c7f80fb71c545e1cdac580...e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.IterateForEach&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Stack - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Collections.IterateForEach(Int32).Stack(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Iterate/IterateForEach.cs#L169-#L177>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.45 μs | 1.61 μs | 1.11 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.IterateForEach%28Int32%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.IterateForEach%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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.IterateForEach&lt;Int32&gt;*'
```

<details>

### System.Collections.IterateForEach&lt;Int32&gt;.Stack(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 | Windows 10.0.22621
Queue | TigerWindows
Baseline | [2f8f6e71c8e9216840c7f80fb71c545e1cdac580](https://github.com/dotnet/runtime/commit/2f8f6e71c8e9216840c7f80fb71c545e1cdac580)
Compare | [e2ad5fcc1702105d9cb9c32802181976df1b97ba](https://github.com/dotnet/runtime/commit/e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2f8f6e71c8e9216840c7f80fb71c545e1cdac580...e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Perf_Convert

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[FromBase64String - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Perf_Convert.FromBase64String.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime.Extensions/Perf.Convert.cs#L77-#L78>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 78.85 ns | 88.13 ns | 1.12 | 0.01 | False | | |
|<ul><li>[FromBase64Chars - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Perf_Convert.FromBase64Chars.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime.Extensions/Perf.Convert.cs#L83-#L84>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 78.90 ns | 88.95 ns | 1.13 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Perf_Convert_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Perf_Convert_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Perf_Convert.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.Perf_Convert*'
```

<details>

### System.Perf_Convert.FromBase64String

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Perf_Convert.FromBase64Chars

#### 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 | [2f8f6e71c8e9216840c7f80fb71c545e1cdac580](https://github.com/dotnet/runtime/commit/2f8f6e71c8e9216840c7f80fb71c545e1cdac580)
Compare | [e2ad5fcc1702105d9cb9c32802181976df1b97ba](https://github.com/dotnet/runtime/commit/e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2f8f6e71c8e9216840c7f80fb71c545e1cdac580...e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Buffers.Text.Tests.Base64Tests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ConvertTryFromBase64Chars - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Buffers.Text.Tests.Base64Tests.ConvertTryFromBase64Chars(NumberOfBytes%3a%201000).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/Base64Tests.cs#L81-#L82>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.01 μs | 1.37 μs | 1.36 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Buffers.Text.Tests.Base64Tests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Buffers.Text.Tests.Base64Tests.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.Buffers.Text.Tests.Base64Tests*'
```

<details>

### System.Buffers.Text.Tests.Base64Tests.ConvertTryFromBase64Chars(NumberOfBytes: 1000)

#### 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 | [2f8f6e71c8e9216840c7f80fb71c545e1cdac580](https://github.com/dotnet/runtime/commit/2f8f6e71c8e9216840c7f80fb71c545e1cdac580)
Compare | [e2ad5fcc1702105d9cb9c32802181976df1b97ba](https://github.com/dotnet/runtime/commit/e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2f8f6e71c8e9216840c7f80fb71c545e1cdac580...e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.Perf_StreamWriter

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[WritePartialCharArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.IO.Tests.Perf_StreamWriter.WritePartialCharArray(writeLength%3a%202).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime.Extensions/Perf.StreamWriter.cs#L72-#L94>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 125.67 ms | 137.04 ms | 1.09 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.IO.Tests.Perf_StreamWriter_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.IO.Tests.Perf_StreamWriter.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.IO.Tests.Perf_StreamWriter*'
```

<details>

### System.IO.Tests.Perf_StreamWriter.WritePartialCharArray(writeLength: 2)

#### 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 | [2f8f6e71c8e9216840c7f80fb71c545e1cdac580](https://github.com/dotnet/runtime/commit/2f8f6e71c8e9216840c7f80fb71c545e1cdac580)
Compare | [e2ad5fcc1702105d9cb9c32802181976df1b97ba](https://github.com/dotnet/runtime/commit/e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2f8f6e71c8e9216840c7f80fb71c545e1cdac580...e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.ContainsFalse&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Stack - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Collections.ContainsFalse(Int32).Stack(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Contains/ContainsFalse.cs#L139-#L148>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 24.94 μs | 32.81 μs | 1.32 | 0.26 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.ContainsFalse%28Int32%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.ContainsFalse%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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.ContainsFalse&lt;Int32&gt;*'
```

<details>

### System.Collections.ContainsFalse&lt;Int32&gt;.Stack(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 | Windows 10.0.22621
Queue | TigerWindows
Baseline | [2f8f6e71c8e9216840c7f80fb71c545e1cdac580](https://github.com/dotnet/runtime/commit/2f8f6e71c8e9216840c7f80fb71c545e1cdac580)
Compare | [e2ad5fcc1702105d9cb9c32802181976df1b97ba](https://github.com/dotnet/runtime/commit/e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2f8f6e71c8e9216840c7f80fb71c545e1cdac580...e2ad5fcc1702105d9cb9c32802181976df1b97ba)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in MicroBenchmarks.Serializers.Xml_ToStream&lt;IndexViewModel&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[XmlSerializer_ - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/MicroBenchmarks.Serializers.Xml_ToStream(IndexViewModel).XmlSerializer_.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/Serializers/Xml_ToStream.cs#L41-#L47>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 42.38 μs | 44.50 μs | 1.05 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/MicroBenchmarks.Serializers.Xml_ToStream%28IndexViewModel%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_20_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/MicroBenchmarks.Serializers.Xml_ToStream%28IndexViewModel%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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'MicroBenchmarks.Serializers.Xml_ToStream&lt;IndexViewModel&gt;*'
```

<details>

### MicroBenchmarks.Serializers.Xml_ToStream&lt;IndexViewModel&gt;.XmlSerializer_

#### 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	2f8f6e71c8e9216840c7f80fb71c545e1cdac580
Compare	e2ad5fcc1702105d9cb9c32802181976df1b97ba
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
FromBase64String - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	78.85 ns	88.13 ns	1.12	0.01	False
FromBase64Chars - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	78.90 ns	88.95 ns	1.13	0.02	False

[Perf] Windows/x64: 7 Regressions on 5/16/2025 10:16:17 PM +00:00 #115789

Description

Run Information

Regressions in System.Collections.IterateForEach<Int32>

Repro

System.Collections.IterateForEach<Int32>.Stack(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Perf_Convert

Repro

System.Perf_Convert.FromBase64String

ETL Files

Histogram

JIT Disasms

System.Perf_Convert.FromBase64Chars

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Buffers.Text.Tests.Base64Tests

Repro

System.Buffers.Text.Tests.Base64Tests.ConvertTryFromBase64Chars(NumberOfBytes: 1000)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.IO.Tests.Perf_StreamWriter

Repro

System.IO.Tests.Perf_StreamWriter.WritePartialCharArray(writeLength: 2)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.ContainsFalse<Int32>

Repro

System.Collections.ContainsFalse<Int32>.Stack(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in MicroBenchmarks.Serializers.Xml_ToStream<IndexViewModel>

Repro

MicroBenchmarks.Serializers.Xml_ToStream<IndexViewModel>.XmlSerializer_

ETL Files

Histogram

JIT Disasms

Docs

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