dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 1 Regression on 4/15/2026 8:16:15 AM +00:00

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arch-wasm arch-x64 branch-refs/heads/main compilationmode-wasm kind-micro os-linux perf-regression runkind-micro runtimetype-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [e697a301818934fb3153829e3c8cb22b462f15fc](https://github.com/dotnet/runtime/commit/e697a301818934fb3153829e3c8cb22b462f15fc)
Compare | [f37ab00ac9ccec092c6f20943ae1277b70e255fb](https://github.com/dotnet/runtime/commit/f37ab00ac9ccec092c6f20943ae1277b70e255fb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e697a301818934fb3153829e3c8cb22b462f15fc...f37ab00ac9ccec092c6f20943ae1277b70e255fb)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.IO.Hashing.Tests.Crc32_AppendPerf

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

  • [Append - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 4.40 μs | 4.97 μs | 1.13 | 0.29 | 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.Hashing.Tests.Crc32_AppendPerf*'
```

### System.IO.Hashing.Tests.Crc32_AppendPerf.Append(BufferSize: 16)

#### 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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