[Perf] Linux/x64: 1 Regression on 6/19/2026 10:51:32 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [18696adecd2e6e6528ba3d543c97b0013b961aa6](https://github.com/dotnet/runtime/commit/18696adecd2e6e6528ba3d543c97b0013b961aa6)
Compare | [f5a2d6907a6a8bf379ca417fa2cbcf1026b9de71](https://github.com/dotnet/runtime/commit/f5a2d6907a6a8bf379ca417fa2cbcf1026b9de71)
Diff | [Diff](https://github.com/dotnet/runtime/compare/18696adecd2e6e6528ba3d543c97b0013b961aa6...f5a2d6907a6a8bf379ca417fa2cbcf1026b9de71)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.Runtime.Intrinsics.Tests.Perf_Vector128Of<Single>

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

• [AllBitsSetBenchmark - 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Runtime.Intrinsics.Tests.Perf_Vector128Of*'
```

### System.Runtime.Intrinsics.Tests.Perf_Vector128Of<Single>.AllBitsSetBenchmark

#### 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)

Start with the benchmark source at performance/src/benchmarks/micro/libraries/System.Runtime.Intrinsics/Perf_Vector128OfT.cs and compare the listed baseline and compare commits. Run benchmarks_ci.py with the provided filter and inspect the linked test report and profiling workflow. Done means the regression is explained and the benchmark no longer shows the reported slowdown.

Written by the indexing model from the issue text.