dotnet / dotnet/perf-autofiling-issues

[Perf] Windows/x86: 1 Regression on 2/25/2026 10:19:01 PM +00:00

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arch-x86 branch-refs/heads/main kind-micro os-windows perf-regression runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ec52b776c69c06ea292420e61aa6911e45bfdbb2](https://github.com/dotnet/runtime/commit/ec52b776c69c06ea292420e61aa6911e45bfdbb2)
Compare | [e5dde0cb50d5827d38008f414a35e9a54c65ac0e](https://github.com/dotnet/runtime/commit/e5dde0cb50d5827d38008f414a35e9a54c65ac0e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ec52b776c69c06ea292420e61aa6911e45bfdbb2...e5dde0cb50d5827d38008f414a35e9a54c65ac0e)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Reflection.Activator<EmptyClass>

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

  • [CreateInstanceGeneric - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 12.50 ns | 15.41 ns | 1.23 | 0.42 | False | | |

[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.Reflection.Activator*'
```

### System.Reflection.Activator<EmptyClass>.CreateInstanceGeneric

#### 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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