dotnet / dotnet/perf-autofiling-issues

[Perf] Windows/x64: 1 Regression on 6/2/2026 12:28:46 AM +00:00

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arch-x64 branch-refs/heads/main compilationmode-tiered Demerit (Bot) kind-micro Look Again Noise os-windows perf-regression runkind-micro runtime-coreclr
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [a82b35567c0b55dbd892abace73a3ad4ac859ccb](https://github.com/dotnet/runtime/commit/a82b35567c0b55dbd892abace73a3ad4ac859ccb)
Compare | [c7d89359fb2afdb3cf045f26c61350885a714811](https://github.com/dotnet/runtime/commit/c7d89359fb2afdb3cf045f26c61350885a714811)
Diff | [Diff](https://github.com/dotnet/runtime/compare/a82b35567c0b55dbd892abace73a3ad4ac859ccb...c7d89359fb2afdb3cf045f26c61350885a714811)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [ReadAsync - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.35 ms | 3.62 ms | 1.08 | 0.47 | False | | |

![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.Perf_RandomAccess*'
```

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 1048576, bufferSize: 4096, 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)

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Assessment

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