[Perf] Linux/arm64: 10 Regressions on 12/3/2025 12:01:02 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [3871ff9b61e5278606e21d1624a1419d11384380](https://github.com/dotnet/runtime/commit/3871ff9b61e5278606e21d1624a1419d11384380)
Compare | [4095103ddce0e469329136dbe9a75976ad3ac170](https://github.com/dotnet/runtime/commit/4095103ddce0e469329136dbe9a75976ad3ac170)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3871ff9b61e5278606e21d1624a1419d11384380...4095103ddce0e469329136dbe9a75976ad3ac170)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Net.Http.Tests.SocketsHttpHandlerPerfTest

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Get_EnumerateHeaders_Unvalidated - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Net.Http.Tests.SocketsHttpHandlerPerfTest.Get_EnumerateHeaders_Unvalidated(ssl%3a%20False%2c%20chunkedResponse%3a%20True%2c%20responseLength%3a%20100000).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 151.22 μs | 195.17 μs | 1.29 | 0.61 | False | | |
|<ul><li>[Get - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Net.Http.Tests.SocketsHttpHandlerPerfTest.Get(ssl%3a%20True%2c%20chunkedResponse%3a%20False%2c%20responseLength%3a%201).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Net.Http/Perf.SocketsHttpHandler.cs#L95-#L107>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 120.00 μs | 134.59 μs | 1.12 | 0.43 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Http.Tests.SocketsHttpHandlerPerfTest_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Http.Tests.SocketsHttpHandlerPerfTest_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Http.Tests.SocketsHttpHandlerPerfTest.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.Http.Tests.SocketsHttpHandlerPerfTest*'
```

<details>

### System.Net.Http.Tests.SocketsHttpHandlerPerfTest.Get_EnumerateHeaders_Unvalidated(ssl: False, chunkedResponse: True, responseLength: 100000)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Net.Http.Tests.SocketsHttpHandlerPerfTest.Get(ssl: True, chunkedResponse: False, responseLength: 1)

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [3871ff9b61e5278606e21d1624a1419d11384380](https://github.com/dotnet/runtime/commit/3871ff9b61e5278606e21d1624a1419d11384380)
Compare | [4095103ddce0e469329136dbe9a75976ad3ac170](https://github.com/dotnet/runtime/commit/4095103ddce0e469329136dbe9a75976ad3ac170)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3871ff9b61e5278606e21d1624a1419d11384380...4095103ddce0e469329136dbe9a75976ad3ac170)
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>[DefaultMutualHandshakeIPv4Async - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Net.Security.Tests.SslStreamTests.DefaultMutualHandshakeIPv4Async.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Net.Security/SslStreamTests.cs#L109-#L111>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 7.11 ms | 7.76 ms | 1.09 | 0.00 | False | | |
|<ul><li>[ReadWriteAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Net.Security.Tests.SslStreamTests.ReadWriteAsync.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Net.Security/SslStreamTests.cs#L232-#L244>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 37.84 μs | 53.34 μs | 1.41 | 0.41 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Security.Tests.SslStreamTests_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Security.Tests.SslStreamTests_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_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.DefaultMutualHandshakeIPv4Async

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Net.Security.Tests.SslStreamTests.ReadWriteAsync

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [3871ff9b61e5278606e21d1624a1419d11384380](https://github.com/dotnet/runtime/commit/3871ff9b61e5278606e21d1624a1419d11384380)
Compare | [4095103ddce0e469329136dbe9a75976ad3ac170](https://github.com/dotnet/runtime/commit/4095103ddce0e469329136dbe9a75976ad3ac170)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3871ff9b61e5278606e21d1624a1419d11384380...4095103ddce0e469329136dbe9a75976ad3ac170)
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_arm64_ubuntu 22.04/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).SingleParallel(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#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> | 12.55 μs | 13.70 μs | 1.09 | 0.01 | False | | |
|<ul><li>[ProducerConsumer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).ProducerConsumer(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#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> | 3.64 μs | 4.96 μs | 1.36 | 0.55 | False | | |
|<ul><li>[ProducerConsumer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Buffers.Tests.RentReturnArrayPoolTests(Byte).ProducerConsumer(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#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> | 2.29 μs | 4.30 μs | 1.88 | 0.62 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Buffers.Tests.RentReturnArrayPoolTests%28Byte%29_003.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_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: True, UseSharedPool: True)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Byte&gt;.ProducerConsumer(RentalSize: 4096, ManipulateArray: True, Async: True, UseSharedPool: True)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Byte&gt;.ProducerConsumer(RentalSize: 4096, ManipulateArray: True, Async: True, 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>


---


### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [3871ff9b61e5278606e21d1624a1419d11384380](https://github.com/dotnet/runtime/commit/3871ff9b61e5278606e21d1624a1419d11384380)
Compare | [4095103ddce0e469329136dbe9a75976ad3ac170](https://github.com/dotnet/runtime/commit/4095103ddce0e469329136dbe9a75976ad3ac170)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3871ff9b61e5278606e21d1624a1419d11384380...4095103ddce0e469329136dbe9a75976ad3ac170)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Net.WebSockets.Tests.SocketSendReceivePerfTest

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ReceiveSend - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Net.WebSockets.Tests.SocketSendReceivePerfTest.ReceiveSend.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Net.WebSockets/Perf.WebSocket.cs#L42-#L48>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 39.69 μs | 57.97 μs | 1.46 | 0.71 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.WebSockets.Tests.SocketSendReceivePerfTest_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.WebSockets.Tests.SocketSendReceivePerfTest.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.WebSockets.Tests.SocketSendReceivePerfTest*'
```

<details>

### System.Net.WebSockets.Tests.SocketSendReceivePerfTest.ReceiveSend

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [3871ff9b61e5278606e21d1624a1419d11384380](https://github.com/dotnet/runtime/commit/3871ff9b61e5278606e21d1624a1419d11384380)
Compare | [4095103ddce0e469329136dbe9a75976ad3ac170](https://github.com/dotnet/runtime/commit/4095103ddce0e469329136dbe9a75976ad3ac170)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3871ff9b61e5278606e21d1624a1419d11384380...4095103ddce0e469329136dbe9a75976ad3ac170)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.Perf_File

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[WriteAllTextAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.IO.Tests.Perf_File.WriteAllTextAsync(size%3a%20100).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.File.cs#L250-#L255>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 87.83 μs | 104.74 μs | 1.19 | 0.55 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.IO.Tests.Perf_File_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.IO.Tests.Perf_File.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_File*'
```

<details>

### System.IO.Tests.Perf_File.WriteAllTextAsync(size: 100)

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [3871ff9b61e5278606e21d1624a1419d11384380](https://github.com/dotnet/runtime/commit/3871ff9b61e5278606e21d1624a1419d11384380)
Compare | [4095103ddce0e469329136dbe9a75976ad3ac170](https://github.com/dotnet/runtime/commit/4095103ddce0e469329136dbe9a75976ad3ac170)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3871ff9b61e5278606e21d1624a1419d11384380...4095103ddce0e469329136dbe9a75976ad3ac170)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Net.Tests.DnsTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[GetHostAddressesAsync - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Net.Tests.DnsTests.GetHostAddressesAsync.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Net.Primitives/DnsTests.cs#L25-#L26>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 107.99 μs | 133.64 μs | 1.24 | 0.44 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Tests.DnsTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_04_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Tests.DnsTests.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.Tests.DnsTests*'
```

<details>

### System.Net.Tests.DnsTests.GetHostAddressesAsync

#### 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	arm64
OS	ubuntu 22.04
Queue	AmpereUbuntu
Baseline	3871ff9b61e5278606e21d1624a1419d11384380
Compare	4095103ddce0e469329136dbe9a75976ad3ac170
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
Get_EnumerateHeaders_Unvalidated - Duration of single invocation ADX - Test Multi Config Graph	151.22 μs	195.17 μs	1.29	0.61	False
Get - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	120.00 μs	134.59 μs	1.12	0.43	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
DefaultMutualHandshakeIPv4Async - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.11 ms	7.76 ms	1.09	0.00	False
ReadWriteAsync - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	37.84 μs	53.34 μs	1.41	0.41	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
SingleParallel - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	12.55 μs	13.70 μs	1.09	0.01	False
ProducerConsumer - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	3.64 μs	4.96 μs	1.36	0.55	False
ProducerConsumer - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.29 μs	4.30 μs	1.88	0.62	False

[Perf] Linux/arm64: 10 Regressions on 12/3/2025 12:01:02 AM +00:00 #122186

Description

Run Information

Regressions in System.Net.Http.Tests.SocketsHttpHandlerPerfTest

Repro

System.Net.Http.Tests.SocketsHttpHandlerPerfTest.Get_EnumerateHeaders_Unvalidated(ssl: False, chunkedResponse: True, responseLength: 100000)

ETL Files

Histogram

JIT Disasms

System.Net.Http.Tests.SocketsHttpHandlerPerfTest.Get(ssl: True, chunkedResponse: False, responseLength: 1)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Net.Security.Tests.SslStreamTests

Repro

System.Net.Security.Tests.SslStreamTests.DefaultMutualHandshakeIPv4Async

ETL Files

Histogram

JIT Disasms

System.Net.Security.Tests.SslStreamTests.ReadWriteAsync

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: True, UseSharedPool: True)

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Net.WebSockets.Tests.SocketSendReceivePerfTest

Repro

System.Net.WebSockets.Tests.SocketSendReceivePerfTest.ReceiveSend

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.IO.Tests.Perf_File

Repro

System.IO.Tests.Perf_File.WriteAllTextAsync(size: 100)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Net.Tests.DnsTests

Repro

System.Net.Tests.DnsTests.GetHostAddressesAsync

ETL Files

Histogram

JIT Disasms

Docs

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