[Perf] Linux/x64: 32 Regressions on 3/5/2026 10:46:25 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [e722f654430bb3ebff09be6c9b582ca66898a634](https://github.com/dotnet/runtime/commit/e722f654430bb3ebff09be6c9b582ca66898a634)
Compare | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e722f654430bb3ebff09be6c9b582ca66898a634...b85f10962df5d097ca466ec0ed83664835671e42)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ProducerConsumer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Object).ProducerConsumer(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20True%2c%20UseSharedPool%3a%20True).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L106-#L149>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.33 μs | 1.60 μs | 1.20 | 0.07 | False | | |
|<ul><li>[ProducerConsumer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Object).ProducerConsumer(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20True%2c%20UseSharedPool%3a%20False).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L106-#L149>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.20 μs | 1.41 μs | 1.18 | 0.10 | False | | |
|<ul><li>[SingleSerial - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Object).SingleSerial(RentalSize%3a%204096%2c%20ManipulateArray%3a%20True%2c%20Async%3a%20True%2c%20UseSharedPool%3a%20False).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L48-#L60>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1S32/TMBB+r9T/4ehLWpE1aWFjCxjRjQESqkBNgWcvubRGjl3ZZ9bA+N85J+0LL2f5fPfl+xGNBISeQMC7pOw8YTu/DU2Dzs+33PfzDRraIAVnVs7J7qu1un948+XhJ1b0dl4qs9NYolNST+O01KX6jQW8zG+uUlhLow5BS8J+v4CtC5jCynemOl++eSz30mEd0Qv4ILXHWfJ6PNJMTzaEjvnVDEGqxekyX15d5IuLRb7Nb4rli2JxOb9eXL9aXC6f53mR57PTpsOD5cWktmSQMhdM3D/jPjhpqn18d9j4bI+y9lkrlTkPVNY0ahe/3BnZqmr6J7mz7UGxFmXN2taYFJCQQiaepJBsgvmsTB2bPO1s8jcS+Yj0SXmyTlVSv5ckfyjaRxzplLfGT6P9IpZ0kCr6mvbsRSzpiaoYjvRETAzHbDx6goOzMQyIKaBP4TYoXW9ZbEmyPaTwXeqAIuZ2Z9kFdBv0QdPqFzq5w/Eoy57gcc9CTgjwjMGJvfAwmZC9P1Y61DiZQJbB/ZEhNYJtoFGasTh/sIGDAt8vR0IOTc2pRb8rTpbgkVXDdBgQZ5rHyurQGvE/3W7oe9Hz5jlSpFEkbB+y093pukbpg8OW/7lk9g+Gq1QKygIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 2.66 μs | 3.53 μs | 1.33 | 0.04 | False | | |
|<ul><li>[ProducerConsumer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Object).ProducerConsumer(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20False%2c%20UseSharedPool%3a%20False).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L106-#L149>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.98 μs | 2.72 μs | 1.37 | 0.22 | False | | |
|<ul><li>[SingleSerial - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Object).SingleSerial(RentalSize%3a%204096%2c%20ManipulateArray%3a%20True%2c%20Async%3a%20True%2c%20UseSharedPool%3a%20True).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L48-#L60>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1STY/TMBC9V+p/GHpJK7JNtltWNGBEd1mBhCpQU+DsTSatkWNX9phtYPnvjJP2wmUsj2de3kc0EhB6AgHvk7LzhO38LjQNOj/fcd/Pt2hoixScWTsnu6/W6v7h7ZfHn1jRu3mpzF5jiU5JPY3TUpfqNxawzFe3KWykUcegJWG/X8DOBUxh7TtTXS7fPJYH6bCO6ENzlrwZjzSzkw2hY3o1I5BqcbrIF7dX+fXVdb7LV8Xiprh5NV+9XuaLxfJlnhd5PjtvOjxaXkxqSwYpc8HE/Qvuo5OmOsR3h43PDihrn7VSmctAZU2j9vHLnZGtqqZ/knvbHhVLUdZsbI1JAQkpZN5JCsk2mM/K1LHJ084mfyORj0iflCfrVCX1B0nyh6JDxJFOeWv8NLovYkkHqaKvac9exJKeqYrhSM/ExHDMxqNnODobs4AYAvoU7oLS9Y7FliTbYwrfpQ4oYmz3ll1At0UfNK1/oZN7HI+y7BmeDizkjAAvGJzYCw+TCdmHU6VDjZMJZBk8nBhSI9gGGqUZi+MHGzgo8P1yJOTQ1Jxa9LviYAmeWDVMhwFxoXmqrA6tEf/T7Ya+Fz1vniNFGkXC9iE73Z2vG5Q+OGz5l0tm/wAqN2BFyQIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 2.60 μs | 3.40 μs | 1.31 | 0.04 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Object%29_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Object%29_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Object%29_003.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Object%29_004.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Object%29_005.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Object%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<Object>*'
```

<details>

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;.ProducerConsumer(RentalSize: 4096, ManipulateArray: False, Async: True, UseSharedPool: True)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;.ProducerConsumer(RentalSize: 4096, ManipulateArray: False, Async: True, UseSharedPool: False)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;.SingleSerial(RentalSize: 4096, ManipulateArray: True, Async: True, UseSharedPool: False)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;.ProducerConsumer(RentalSize: 4096, ManipulateArray: False, Async: False, UseSharedPool: False)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;.SingleSerial(RentalSize: 4096, ManipulateArray: True, Async: True, 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>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [e722f654430bb3ebff09be6c9b582ca66898a634](https://github.com/dotnet/runtime/commit/e722f654430bb3ebff09be6c9b582ca66898a634)
Compare | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e722f654430bb3ebff09be6c9b582ca66898a634...b85f10962df5d097ca466ec0ed83664835671e42)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Threading.Tests.Perf_SemaphoreSlim

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ReleaseWaitAsync_WithTimeout - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Threading.Tests.Perf_SemaphoreSlim.ReleaseWaitAsync_WithTimeout.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Threading/Perf.SemaphoreSlim.cs#L39-#L45>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 2.59 μs | 3.24 μs | 1.25 | 0.38 | False | | |
|<ul><li>[ReleaseWaitAsync_WithCancellationTokenAndTimeout - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Threading.Tests.Perf_SemaphoreSlim.ReleaseWaitAsync_WithCancellationTokenAndTimeout.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Threading/Perf.SemaphoreSlim.cs#L47-#L53>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 2.83 μs | 3.56 μs | 1.26 | 0.39 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Threading.Tests.Perf_SemaphoreSlim_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Threading.Tests.Perf_SemaphoreSlim_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Threading.Tests.Perf_SemaphoreSlim.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.Threading.Tests.Perf_SemaphoreSlim*'
```

<details>

### System.Threading.Tests.Perf_SemaphoreSlim.ReleaseWaitAsync_WithTimeout

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Threading.Tests.Perf_SemaphoreSlim.ReleaseWaitAsync_WithCancellationTokenAndTimeout

#### 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 | ViperUbuntu
Baseline | [e722f654430bb3ebff09be6c9b582ca66898a634](https://github.com/dotnet/runtime/commit/e722f654430bb3ebff09be6c9b582ca66898a634)
Compare | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e722f654430bb3ebff09be6c9b582ca66898a634...b85f10962df5d097ca466ec0ed83664835671e42)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.Perf_FileStream

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[AppendAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.AppendAsync(fileSize%3a%201048576%2c%20userBufferSize%3a%204096%2c%20options%3a%20DeleteOnClose%2c%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L320-#L324>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.34 ms | 1.42 ms | 1.06 | 0.45 | False | | |
|<ul><li>[ReadAsync_NoBuffering - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize%3a%201048576%2c%20userBufferSize%3a%2016384%2c%20options%3a%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L286-#L290>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 165.35 μs | 260.64 μs | 1.58 | 0.31 | False | | |
|<ul><li>[ReadAsync_NoBuffering - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize%3a%20104857600%2c%20userBufferSize%3a%2016384%2c%20options%3a%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L286-#L290>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 19.45 ms | 29.83 ms | 1.53 | 0.54 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync(fileSize%3a%201048576%2c%20userBufferSize%3a%204096%2c%20options%3a%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L280-#L284>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 444.71 μs | 605.37 μs | 1.36 | 0.20 | False | | |
|<ul><li>[ReadAsync_NoBuffering - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize%3a%20104857600%2c%20userBufferSize%3a%2016384%2c%20options%3a%20None).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L286-#L290>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 19.32 ms | 28.00 ms | 1.45 | 0.57 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync(fileSize%3a%201048576%2c%20userBufferSize%3a%20512%2c%20options%3a%20None).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L280-#L284>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 597.18 μs | 789.50 μs | 1.32 | 0.15 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync(fileSize%3a%20104857600%2c%20userBufferSize%3a%204096%2c%20options%3a%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L280-#L284>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 50.43 ms | 71.38 ms | 1.42 | 0.22 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync(fileSize%3a%201048576%2c%20userBufferSize%3a%20512%2c%20options%3a%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L280-#L284>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 579.40 μs | 838.49 μs | 1.45 | 0.19 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync(fileSize%3a%201048576%2c%20userBufferSize%3a%204096%2c%20options%3a%20None).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L280-#L284>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 520.63 μs | 591.44 μs | 1.14 | 0.24 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_FileStream.ReadAsync(fileSize%3a%20104857600%2c%20userBufferSize%3a%204096%2c%20options%3a%20None).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.FileStream.cs#L280-#L284>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 52.92 ms | 63.63 ms | 1.20 | 0.21 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_003.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_004.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_005.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_006.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_007.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_008.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_009.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream_010.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_FileStream.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.Perf_FileStream*'
```

<details>

### System.IO.Tests.Perf_FileStream.AppendAsync(fileSize: 1048576, userBufferSize: 4096, options: DeleteOnClose, Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 1048576, userBufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 104857600, userBufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 4096, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 104857600, userBufferSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 512, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 104857600, userBufferSize: 4096, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 512, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 4096, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 104857600, userBufferSize: 4096, options: None)

#### 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 | ViperUbuntu
Baseline | [e722f654430bb3ebff09be6c9b582ca66898a634](https://github.com/dotnet/runtime/commit/e722f654430bb3ebff09be6c9b582ca66898a634)
Compare | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e722f654430bb3ebff09be6c9b582ca66898a634...b85f10962df5d097ca466ec0ed83664835671e42)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Net.Security.Tests.SslStreamTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ConcurrentReadWriteLargeBuffer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Net.Security.Tests.SslStreamTests.ConcurrentReadWriteLargeBuffer.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Net.Security/SslStreamTests.cs#L290-#L331>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 19.69 μs | 23.85 μs | 1.21 | 0.22 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Net.Security.Tests.SslStreamTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Net.Security.Tests.SslStreamTests.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.Net.Security.Tests.SslStreamTests*'
```

<details>

### System.Net.Security.Tests.SslStreamTests.ConcurrentReadWriteLargeBuffer

#### 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 | ViperUbuntu
Baseline | [e722f654430bb3ebff09be6c9b582ca66898a634](https://github.com/dotnet/runtime/commit/e722f654430bb3ebff09be6c9b582ca66898a634)
Compare | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e722f654430bb3ebff09be6c9b582ca66898a634...b85f10962df5d097ca466ec0ed83664835671e42)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.Perf_RandomAccess

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ReadScatterAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize%3a%201048576%2c%20buffersSize%3a%2016384%2c%20options%3a%20None).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.RandomAccess.cs#L193-#L211>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 203.18 μs | 310.60 μs | 1.53 | 0.19 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize%3a%20104857600%2c%20bufferSize%3a%2016384%2c%20options%3a%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.RandomAccess.cs#L110-#L127>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1RXY/TMBB8r9T/sPTFrcg17seVNsgS5TgBQidQW8Ej8iWb1sixK3t918Lx37HT9IWXtbLZmZ2Z1UhA6AkEvGPbsydsxp+/jnex5cff0NU/N9JUtlmXJXo/3qCs1v5symGtNG7VbyxgwufL2zcLzjN4DHWNrmsvZst5BvZIyhpfQAs7OGts8CP2tt/TcbWsCV3cXUlCUg0Op3y6uOGTmwnf8VUxmxTT5fh2Nl8t+eo15wXnow7p8GgjkFWWDFLugkn4K++jk3FZ+u+w9vkhyvZ5I5W5DpTW1GqfNp+NbFQ5/MPubHNUWia5D7ZCVgAjhQ4rlgHbBPNFmSo147Sz7G8S8hHpk/JknSql/iBJ/lB0SDzSKR9dD1O0IpXsYlW0NWvVi1SyTqq4PFknTFyeUb/3Akdnf2FJsEWn0GfwPihd7aLZLcnmmMF3qQOKdLE7G1NAt0EfNK2f0Mk99nt5/gLPh2ikY4BXkZxiFh4GA7L3p1KHCgcDyHO4P0VKjWBriAeOXMrswYZ4KPAtOAlyaKp4tZR3eZCO4Dm6huFlQFxlnkqrQ2PE/3LPl74Xre44R4o0Chbjw5j0uft8QOmDwwYNsdE/wTwTO6YCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 18.50 ms | 28.68 ms | 1.55 | 0.50 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize%3a%201048576%2c%20bufferSize%3a%204096%2c%20options%3a%20None).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.RandomAccess.cs#L110-#L127>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 448.82 μs | 568.64 μs | 1.27 | 0.23 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize%3a%201048576%2c%20bufferSize%3a%204096%2c%20options%3a%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.RandomAccess.cs#L110-#L127>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 419.60 μs | 636.17 μs | 1.52 | 0.17 | False | | |
|<ul><li>[ReadAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize%3a%20104857600%2c%20bufferSize%3a%2016384%2c%20options%3a%20None).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.RandomAccess.cs#L110-#L127>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 18.82 ms | 25.96 ms | 1.38 | 0.57 | False | | |
|<ul><li>[ReadScatterAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize%3a%201048576%2c%20buffersSize%3a%2016384%2c%20options%3a%20Asynchronous).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.RandomAccess.cs#L193-#L211>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 198.07 μs | 293.95 μs | 1.48 | 0.25 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_RandomAccess_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_RandomAccess_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_RandomAccess_003.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_RandomAccess_004.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_RandomAccess_005.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_RandomAccess_006.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.IO.Tests.Perf_RandomAccess.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.Perf_RandomAccess*'
```

<details>

### System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize: 1048576, buffersSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 104857600, bufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 1048576, bufferSize: 4096, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 1048576, bufferSize: 4096, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 104857600, bufferSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize: 1048576, buffersSize: 16384, options: Asynchronous)

#### 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 | ViperUbuntu
Baseline | [e722f654430bb3ebff09be6c9b582ca66898a634](https://github.com/dotnet/runtime/commit/e722f654430bb3ebff09be6c9b582ca66898a634)
Compare | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e722f654430bb3ebff09be6c9b582ca66898a634...b85f10962df5d097ca466ec0ed83664835671e42)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Text.RegularExpressions.Tests.Perf_Regex_Cache

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[IsMatch_Multithreading - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Text.RegularExpressions.Tests.Perf_Regex_Cache.IsMatch_Multithreading(total%3a%2040000%2c%20unique%3a%201600%2c%20cacheSize%3a%203200).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.RegularExpressions/Perf.Regex.Cache.cs#L63-#L89>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 8.63 ms | 9.94 ms | 1.15 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Text.RegularExpressions.Tests.Perf_Regex_Cache_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Text.RegularExpressions.Tests.Perf_Regex_Cache.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.Text.RegularExpressions.Tests.Perf_Regex_Cache*'
```

<details>

### System.Text.RegularExpressions.Tests.Perf_Regex_Cache.IsMatch_Multithreading(total: 40000, unique: 1600, cacheSize: 3200)

#### 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 | ViperUbuntu
Baseline | [e722f654430bb3ebff09be6c9b582ca66898a634](https://github.com/dotnet/runtime/commit/e722f654430bb3ebff09be6c9b582ca66898a634)
Compare | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e722f654430bb3ebff09be6c9b582ca66898a634...b85f10962df5d097ca466ec0ed83664835671e42)
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>[SingleSerial - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).SingleSerial(RentalSize%3a%204096%2c%20ManipulateArray%3a%20True%2c%20Async%3a%20True%2c%20UseSharedPool%3a%20False).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L48-#L60>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1STY/TMBC9r9T/MPTiVmSbbItWasCIdllAQpVQU+Bskklr5NiVPWYbWP4747S9cBnL45mX9xGDBISBQMI7UfWBsJutY9uiD7Md98Nsi5a2SNHblfeq/+KcGR7erHvCt7NK273BCr1WZpJmlan0byzhVbG8z2CjrD5GowiH7RJ2PmIGq9Db+nr5GrA6KI9Nwi7hgzIBp+L16MYwOdUSembXMATpDifzYn5/W9zd3hW7Ylku5uViOVssi3mxWLwsirIoppdNj0fHi6JxZJFyH23av+L+8MrWh/TusQ35AVUT8k5pex2onW31Pn25t6rT9eSPeHDdUbMW7ezGNShKEKSRiYsMxDbaz9o2qcnT3om/ichHpE86kPO6Vua9IvVd0yHhKK+Ds2GSzJepZGepcqjZwF6mkl2oyvORXYjJ8zEd3TzD0bufWBOkFDBksI7aNDsWW5Hqjhl8UyaiTKk9OHYB/RZDNLT6hV7tcXST58/wdGAhFwR4weDEXgQYj8k9nmoTGxyPIc/h8cSQBsG10GrDWJw/uMhBQRiWEyGPtuHUkt81J0vwxKphch6QV5qn2pnYWfk/3f7cD3LgzXOkyaAUbB+y0/3lukEVoseO/zkx/QczFnGzyAIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 2.01 μs | 2.24 μs | 1.11 | 0.08 | False | | |
|<ul><li>[ProducerConsumer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).ProducerConsumer(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20True%2c%20UseSharedPool%3a%20False).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L106-#L149>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.18 μs | 1.41 μs | 1.20 | 0.06 | False | | |
|<ul><li>[SingleSerial - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).SingleSerial(RentalSize%3a%204096%2c%20ManipulateArray%3a%20True%2c%20Async%3a%20True%2c%20UseSharedPool%3a%20True).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L48-#L60>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.92 μs | 2.27 μs | 1.18 | 0.10 | False | | |
|<ul><li>[ProducerConsumer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).ProducerConsumer(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20True%2c%20UseSharedPool%3a%20True).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L106-#L149>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.35 μs | 1.63 μs | 1.21 | 0.07 | False | | |
|<ul><li>[ProducerConsumer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).ProducerConsumer(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20False%2c%20UseSharedPool%3a%20False).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/ArrayPoolTests.cs#L106-#L149>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.99 μs | 2.77 μs | 1.39 | 0.22 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_003.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_004.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_005.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_10_2026/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_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;.SingleSerial(RentalSize: 4096, ManipulateArray: True, Async: True, UseSharedPool: False)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Byte&gt;.ProducerConsumer(RentalSize: 4096, ManipulateArray: False, Async: True, UseSharedPool: False)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Byte&gt;.SingleSerial(RentalSize: 4096, ManipulateArray: True, Async: True, UseSharedPool: True)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Byte&gt;.ProducerConsumer(RentalSize: 4096, ManipulateArray: False, Async: True, UseSharedPool: True)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Byte&gt;.ProducerConsumer(RentalSize: 4096, ManipulateArray: False, Async: False, UseSharedPool: 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>

Name	Value
Architecture	x64
OS	ubuntu 22.04
Queue	ViperUbuntu
Baseline	e722f654430bb3ebff09be6c9b582ca66898a634
Compare	b85f10962df5d097ca466ec0ed83664835671e42
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
ProducerConsumer - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.33 μs	1.60 μs	1.20	0.07	False
ProducerConsumer - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.20 μs	1.41 μs	1.18	0.10	False
SingleSerial - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.66 μs	3.53 μs	1.33	0.04	False
ProducerConsumer - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.98 μs	2.72 μs	1.37	0.22	False
SingleSerial - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.60 μs	3.40 μs	1.31	0.04	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ReleaseWaitAsync_WithTimeout - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.59 μs	3.24 μs	1.25	0.38	False
ReleaseWaitAsync_WithCancellationTokenAndTimeout - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.83 μs	3.56 μs	1.26	0.39	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
AppendAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.34 ms	1.42 ms	1.06	0.45	False
ReadAsync_NoBuffering - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	165.35 μs	260.64 μs	1.58	0.31	False
ReadAsync_NoBuffering - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	19.45 ms	29.83 ms	1.53	0.54	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	444.71 μs	605.37 μs	1.36	0.20	False
ReadAsync_NoBuffering - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	19.32 ms	28.00 ms	1.45	0.57	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	597.18 μs	789.50 μs	1.32	0.15	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	50.43 ms	71.38 ms	1.42	0.22	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	579.40 μs	838.49 μs	1.45	0.19	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	520.63 μs	591.44 μs	1.14	0.24	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	52.92 ms	63.63 ms	1.20	0.21	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
ReadScatterAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	203.18 μs	310.60 μs	1.53	0.19	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	18.50 ms	28.68 ms	1.55	0.50	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	448.82 μs	568.64 μs	1.27	0.23	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	419.60 μs	636.17 μs	1.52	0.17	False
ReadAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	18.82 ms	25.96 ms	1.38	0.57	False
ReadScatterAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	198.07 μs	293.95 μs	1.48	0.25	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
SingleSerial - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.01 μs	2.24 μs	1.11	0.08	False
ProducerConsumer - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.18 μs	1.41 μs	1.20	0.06	False
SingleSerial - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.92 μs	2.27 μs	1.18	0.10	False
ProducerConsumer - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.35 μs	1.63 μs	1.21	0.07	False
ProducerConsumer - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.99 μs	2.77 μs	1.39	0.22	False

[Perf] Linux/x64: 32 Regressions on 3/5/2026 10:46:25 PM +00:00 #125391

Description

Run Information

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

Repro

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

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

System.Buffers.Tests.RentReturnArrayPoolTests<Object>.ProducerConsumer(RentalSize: 4096, ManipulateArray: False, Async: False, UseSharedPool: False)

ETL Files

Histogram

JIT Disasms

System.Buffers.Tests.RentReturnArrayPoolTests<Object>.SingleSerial(RentalSize: 4096, ManipulateArray: True, Async: True, UseSharedPool: True)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Threading.Tests.Perf_SemaphoreSlim

Repro

System.Threading.Tests.Perf_SemaphoreSlim.ReleaseWaitAsync_WithTimeout

ETL Files

Histogram

JIT Disasms

System.Threading.Tests.Perf_SemaphoreSlim.ReleaseWaitAsync_WithCancellationTokenAndTimeout

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.IO.Tests.Perf_FileStream

Repro

System.IO.Tests.Perf_FileStream.AppendAsync(fileSize: 1048576, userBufferSize: 4096, options: DeleteOnClose, Asynchronous)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 1048576, userBufferSize: 16384, options: Asynchronous)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 104857600, userBufferSize: 16384, options: Asynchronous)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 4096, options: Asynchronous)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 104857600, userBufferSize: 16384, options: None)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 512, options: None)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 104857600, userBufferSize: 4096, options: Asynchronous)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 512, options: Asynchronous)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 4096, options: None)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 104857600, userBufferSize: 4096, options: None)

ETL Files

Histogram