[Perf] Windows/x86: 1 Regression on 10/14/2024 9:51:31 AM

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [7b69459abc771fda88349204654989c69ade0592](https://github.com/dotnet/runtime/commit/7b69459abc771fda88349204654989c69ade0592)
Compare | [8a7fa48169e18c9b8e480d759efa0e1564c0ca49](https://github.com/dotnet/runtime/commit/8a7fa48169e18c9b8e480d759efa0e1564c0ca49)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7b69459abc771fda88349204654989c69ade0592...8a7fa48169e18c9b8e480d759efa0e1564c0ca49)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.UnmanagedMemoryStreamTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ReadAsBytes - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x86_Windows 10.0.22621/System.IO.Tests.UnmanagedMemoryStreamTests.ReadAsBytes.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO/UnmanagedMemoryStreamTests.cs#L30-#L39>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 47.11 μs | 51.49 μs | 1.09 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_15_2024/refs/heads/main_x86_Windows%2010.0.22621_Regression/System.IO.Tests.UnmanagedMemoryStreamTests_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/10_15_2024/refs/heads/main_x86_Windows%2010.0.22621_Regression/System.IO.Tests.UnmanagedMemoryStreamTests.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.UnmanagedMemoryStreamTests*'
```

<details>

### System.IO.Tests.UnmanagedMemoryStreamTests.ReadAsBytes

#### 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>

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[Perf] Windows/x86: 1 Regression on 10/14/2024 9:51:31 AM #43148

performanceautofiler
openedon Oct 15, 2024

Run Information

Regressions in System.IO.Tests.UnmanagedMemoryStreamTests

Repro

System.IO.Tests.UnmanagedMemoryStreamTests.ReadAsBytes

ETL Files

Histogram

JIT Disasms

Docs

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Name	Value
Architecture	x86
OS	Windows 10.0.22621
Queue	TigerWindows
Baseline	7b69459abc771fda88349204654989c69ade0592
Compare	8a7fa48169e18c9b8e480d759efa0e1564c0ca49
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro