[Perf] Windows/x86: 1 Regression on 4/19/2026 4:29:27 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [dbd3e33df9ccf74b91045e095477726c2bf83916](https://github.com/dotnet/runtime/commit/dbd3e33df9ccf74b91045e095477726c2bf83916)
Compare | [6e70a8c21132e66755716a5110f87dd8a1d0b80d](https://github.com/dotnet/runtime/commit/6e70a8c21132e66755716a5110f87dd8a1d0b80d)
Diff | [Diff](https://github.com/dotnet/runtime/compare/dbd3e33df9ccf74b91045e095477726c2bf83916...6e70a8c21132e66755716a5110f87dd8a1d0b80d)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Numerics.Tests.Perf_VectorConvert

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

• [Convert_double_long - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

![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.Numerics.Tests.Perf_VectorConvert*'
```

### System.Numerics.Tests.Perf_VectorConvert.Convert_double_long

#### 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)