[Perf] Linux/x64: 1 Regression on 6/23/2026 8:41:58 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [e3ecd30e4d6bfeedec6b4730c8ef87951cfe1f17](https://github.com/dotnet/runtime/commit/e3ecd30e4d6bfeedec6b4730c8ef87951cfe1f17)
Compare | [feb1fe23e41b7af2401edbd4230bf11dcb9cfc96](https://github.com/dotnet/runtime/commit/feb1fe23e41b7af2401edbd4230bf11dcb9cfc96)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e3ecd30e4d6bfeedec6b4730c8ef87951cfe1f17...feb1fe23e41b7af2401edbd4230bf11dcb9cfc96)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in SIMD.ConsoleMandel

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

• [ScalarDoubleSinglethreadRaw - 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 'SIMD.ConsoleMandel*'
```

### SIMD.ConsoleMandel.ScalarDoubleSinglethreadRaw

#### 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 SIMD.ConsoleMandel benchmark source at src/benchmarks/micro/runtime/SIMD/ConsoleMandel/ConsoleMandel.cs#L60-L61 and compare the linked baseline and test commits. Reproduce the regression with scripts/benchmarks_ci.py using the documented command; done means identifying and addressing the cause of the increase from 19.66 to 21.88 seconds.

Written by the indexing model from the issue text.