[Perf] Linux/x64: 9 Regressions on 10/6/2025 11:48:34 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | TigerUbuntu
Baseline | [75662173e3918f2176b74e467dc8e41d4f01d4d4](https://github.com/dotnet/runtime/commit/75662173e3918f2176b74e467dc8e41d4f01d4d4)
Compare | [5811908773f68b4b430f1107e6b3dd1a4f691eca](https://github.com/dotnet/runtime/commit/5811908773f68b4b430f1107e6b3dd1a4f691eca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/75662173e3918f2176b74e467dc8e41d4f01d4d4...5811908773f68b4b430f1107e6b3dd1a4f691eca)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.BinaryWriterExtendedTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[WriteAsciiCharArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars%3a%208000).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO/BinaryWriterExtendedTests.cs#L29-#L34>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1RwW7bMAy9B8g/cLkowdzYCbY2yyBgaVZ0xVYMaIL1rNlMrEGWAopeY6z791FxctmFgh7Jx8dHhwyMkUHDJ7XpImMzffg+3QoUp7fWG+qeyTLS3ZHRV1j1mRO2iqW169rQish04w2T9ftv6PdcP/iExyUsiqKYqI/DgZNBZidEMqkyjGwbHM+L+furYnE1e7ctFsviZjmfTWfF9c2H69nbolhK67mT8BCkUVWBPXJOrU/9F96fZHxZpzzhLuY1mirmjbH+UlAGv7P7NLnzprHl+I9ah+ZgnWEb/GOoUC1BsUXCSmWgnlr/1foqgVJNQf1NQu6Rv9jIgWxp3GfD5tlynXgM2Rh8HCcjdQpZv6o+xeykXqeQnaXq/snOwnT/TIaDVzhQ+IUlwwbJYszgtrWu2sqyGzbNIYMfxrWo0xXWQVxAesLYOl79RjJ7HA7y/BVealnkzABvhJzFiwijEYe7Y+naCkcjyHO4OwqlQwg72FknXHI/CK0cCuKpOQmidHaC5HcpN2V4ka1h3Bfoi8xjGVzbeP2/3K7Hoz7pljq27FArsQ/F6e78fUQTW8IGPavJP7OQe6uUAgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 300.05 ns | 353.74 ns | 1.18 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.IO.Tests.BinaryWriterExtendedTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.IO.Tests.BinaryWriterExtendedTests.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.IO.Tests.BinaryWriterExtendedTests*'
```

<details>

### System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars: 8000)

#### 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 | TigerUbuntu
Baseline | [75662173e3918f2176b74e467dc8e41d4f01d4d4](https://github.com/dotnet/runtime/commit/75662173e3918f2176b74e467dc8e41d4f01d4d4)
Compare | [5811908773f68b4b430f1107e6b3dd1a4f691eca](https://github.com/dotnet/runtime/commit/5811908773f68b4b430f1107e6b3dd1a4f691eca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/75662173e3918f2176b74e467dc8e41d4f01d4d4...5811908773f68b4b430f1107e6b3dd1a4f691eca)
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_ubuntu 22.04/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> | 197.42 ms | 223.94 ms | 1.13 | 0.04 | False | | |
|<ul><li>[Where01ForX - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/LinqBenchmarks.Where01ForX.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/runtime/Linq/Linq.cs#L254-#L279>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1RwW4TMRC9R8o/DLk4EduuW1opDbIELQUk6KWNKFezns0avHawx20iyr8zzm4uSNaMPH7z5s2zQwLCRKDgnfhq/e9r9E3X6/grnT52GFGefQzxu3g7nTiG6pYwMtZoQrI9zs/l+eWJXJ6cXazlclXO5emFvJLLN1evpVxJuRg7I24DNwoTyCPVMfvSf+T9ETWPLe8R21R3qE2qe239EdAE39pNmbz3urfN/I+4Cf3WOk02+LtgUKxAkGXFRlQg7rP/Yr0pRUbHIP4WIZ+QPttEIdpGuw+a9KOlrvDoaFPwaV6sUCVUw6rqEKuDelVCNUpVQ6pGYWpIi+nkBbYx/MSG4AGjxVTBdbbOrHnZB9L9toJv2mVUax5yE9gFjPeYsqP3Txj1BqeTun6B52L9yACvmJzYiwSzGYXbXeOywdkM6hpud0zpEEILrXXMZf0GQuaPgnRoLoIiesO/VvxuOh0JnnlrmA8AdZS5a4LLvVf/y90P9aQOuhlHlhwqwfYhO70fr3eoU47Yoyex+Af832skVgIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 108.86 ms | 125.80 ms | 1.16 | 0.05 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/LinqBenchmarks_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/LinqBenchmarks_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'LinqBenchmarks*'
```

<details>

### LinqBenchmarks.Where01LinqMethodNestedX

#### ETL Files

#### Histogram

#### JIT Disasms

### LinqBenchmarks.Where01ForX

#### 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 | TigerUbuntu
Baseline | [75662173e3918f2176b74e467dc8e41d4f01d4d4](https://github.com/dotnet/runtime/commit/75662173e3918f2176b74e467dc8e41d4f01d4d4)
Compare | [5811908773f68b4b430f1107e6b3dd1a4f691eca](https://github.com/dotnet/runtime/commit/5811908773f68b4b430f1107e6b3dd1a4f691eca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/75662173e3918f2176b74e467dc8e41d4f01d4d4...5811908773f68b4b430f1107e6b3dd1a4f691eca)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.ContainsTrue&lt;String&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_ubuntu 22.04/System.Collections.ContainsTrue(String).Stack(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Contains/ContainsTrue.cs#L164-#L173>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 180.92 μs | 234.96 μs | 1.30 | 0.39 | False | | |
|<ul><li>[ImmutableArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Collections.ContainsTrue(String).ImmutableArray(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Contains/ContainsTrue.cs#L200-#L209>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 183.05 μs | 208.03 μs | 1.14 | 0.32 | False | | |
|<ul><li>[List - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Collections.ContainsTrue(String).List(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Contains/ContainsTrue.cs#L78-#L87>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 184.92 μs | 234.08 μs | 1.27 | 0.14 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.ContainsTrue%28String%29_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.ContainsTrue%28String%29_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.ContainsTrue%28String%29_003.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.ContainsTrue%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.ContainsTrue<String>*'
```

<details>

### System.Collections.ContainsTrue&lt;String&gt;.Stack(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.ContainsTrue&lt;String&gt;.ImmutableArray(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.ContainsTrue&lt;String&gt;.List(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 | TigerUbuntu
Baseline | [75662173e3918f2176b74e467dc8e41d4f01d4d4](https://github.com/dotnet/runtime/commit/75662173e3918f2176b74e467dc8e41d4f01d4d4)
Compare | [5811908773f68b4b430f1107e6b3dd1a4f691eca](https://github.com/dotnet/runtime/commit/5811908773f68b4b430f1107e6b3dd1a4f691eca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/75662173e3918f2176b74e467dc8e41d4f01d4d4...5811908773f68b4b430f1107e6b3dd1a4f691eca)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.CreateAddAndClear&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[List - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Collections.CreateAddAndClear(String).List(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/CreateAddAndClear.cs#L54-#L64>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 2.13 μs | 2.46 μs | 1.15 | 0.12 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.CreateAddAndClear%28String%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.CreateAddAndClear%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.CreateAddAndClear<String>*'
```

<details>

### System.Collections.CreateAddAndClear&lt;String&gt;.List(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 | TigerUbuntu
Baseline | [75662173e3918f2176b74e467dc8e41d4f01d4d4](https://github.com/dotnet/runtime/commit/75662173e3918f2176b74e467dc8e41d4f01d4d4)
Compare | [5811908773f68b4b430f1107e6b3dd1a4f691eca](https://github.com/dotnet/runtime/commit/5811908773f68b4b430f1107e6b3dd1a4f691eca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/75662173e3918f2176b74e467dc8e41d4f01d4d4...5811908773f68b4b430f1107e6b3dd1a4f691eca)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.IterateForEachNonGeneric&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ArrayList - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Collections.IterateForEachNonGeneric(Int32).ArrayList(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Iterate/IterateForEachNonGeneric.cs#L28-#L36>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.30 μs | 1.49 μs | 1.15 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.IterateForEachNonGeneric%28Int32%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.IterateForEachNonGeneric%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.IterateForEachNonGeneric<Int32>*'
```

<details>

### System.Collections.IterateForEachNonGeneric&lt;Int32&gt;.ArrayList(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 | TigerUbuntu
Baseline | [75662173e3918f2176b74e467dc8e41d4f01d4d4](https://github.com/dotnet/runtime/commit/75662173e3918f2176b74e467dc8e41d4f01d4d4)
Compare | [5811908773f68b4b430f1107e6b3dd1a4f691eca](https://github.com/dotnet/runtime/commit/5811908773f68b4b430f1107e6b3dd1a4f691eca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/75662173e3918f2176b74e467dc8e41d4f01d4d4...5811908773f68b4b430f1107e6b3dd1a4f691eca)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Buffers.Tests.RentReturnArrayPoolTests&lt;Byte&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[SingleParallel - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).SingleParallel(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20False%2c%20UseSharedPool%3a%20True).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L62-#L81>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 26.29 ns | 28.64 ns | 1.09 | 0.47 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_14_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%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.Buffers.Tests.RentReturnArrayPoolTests<Byte>*'
```

<details>

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Byte&gt;.SingleParallel(RentalSize: 4096, ManipulateArray: False, Async: False, UseSharedPool: True)

#### 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	TigerUbuntu
Baseline	75662173e3918f2176b74e467dc8e41d4f01d4d4
Compare	5811908773f68b4b430f1107e6b3dd1a4f691eca
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
Where01LinqMethodNestedX - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	197.42 ms	223.94 ms	1.13	0.04	False
Where01ForX - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	108.86 ms	125.80 ms	1.16	0.05	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
Stack - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	180.92 μs	234.96 μs	1.30	0.39	False
ImmutableArray - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	183.05 μs	208.03 μs	1.14	0.32	False
List - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	184.92 μs	234.08 μs	1.27	0.14	False

[Perf] Linux/x64: 9 Regressions on 10/6/2025 11:48:34 PM +00:00 #63758

Description

Run Information

Regressions in System.IO.Tests.BinaryWriterExtendedTests

Repro

System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars: 8000)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in LinqBenchmarks

Repro

LinqBenchmarks.Where01LinqMethodNestedX

ETL Files

Histogram

JIT Disasms

LinqBenchmarks.Where01ForX

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.ContainsTrue<String>

Repro

System.Collections.ContainsTrue<String>.Stack(Size: 512)

ETL Files

Histogram

JIT Disasms

System.Collections.ContainsTrue<String>.ImmutableArray(Size: 512)

ETL Files

Histogram

JIT Disasms

System.Collections.ContainsTrue<String>.List(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.CreateAddAndClear<String>

Repro

System.Collections.CreateAddAndClear<String>.List(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.IterateForEachNonGeneric<Int32>

Repro

System.Collections.IterateForEachNonGeneric<Int32>.ArrayList(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Buffers.Tests.RentReturnArrayPoolTests<Byte>

Repro

System.Buffers.Tests.RentReturnArrayPoolTests<Byte>.SingleParallel(RentalSize: 4096, ManipulateArray: False, Async: False, UseSharedPool: True)

ETL Files

Histogram

JIT Disasms

Docs

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