dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 1 Regression on 6/3/2026 7:09:26 AM +00:00

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aot-true arch-wasm arch-x64 branch-refs/heads/main compilationmode-wasm kind-micro Look Again os-linux perf-regression PGO runkind-micro untriaged wasm-aot
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [05af41550d4c764284d03bb8d79a977c5cacba8d](https://github.com/dotnet/runtime/commit/05af41550d4c764284d03bb8d79a977c5cacba8d)
Compare | [3752108f83037fc93b8addcc62cf58c480f3df30](https://github.com/dotnet/runtime/commit/3752108f83037fc93b8addcc62cf58c480f3df30)
Diff | [Diff](https://github.com/dotnet/runtime/compare/05af41550d4c764284d03bb8d79a977c5cacba8d...3752108f83037fc93b8addcc62cf58c480f3df30)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.IO.Tests.Perf_RandomAccess

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [Read - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 6.55 ms | 11.99 ms | 1.83 | 0.09 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.Perf_RandomAccess*'
```

### System.IO.Tests.Perf_RandomAccess.Read(fileSize: 104857600, bufferSize: 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)

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Assessment

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