[Perf] Linux/x64: 2 Regressions on 4/18/2026 4:02:25 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [38af44d518908fa536ef289d62c73706769d18ab](https://github.com/dotnet/runtime/commit/38af44d518908fa536ef289d62c73706769d18ab)
Compare | [b70c35ed8a2e7ae0d91de76f4f5d26c2e7d2c6cd](https://github.com/dotnet/runtime/commit/b70c35ed8a2e7ae0d91de76f4f5d26c2e7d2c6cd)
Diff | [Diff](https://github.com/dotnet/runtime/compare/38af44d518908fa536ef289d62c73706769d18ab...b70c35ed8a2e7ae0d91de76f4f5d26c2e7d2c6cd)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.MathBenchmarks.Double

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

• [Exp2 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 910.53 μs | 971.97 μs | 1.07 | 0.21 | False | | |
|

• [Atan2 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 843.95 μs | 897.12 μs | 1.06 | 0.09 | False | | |

![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.MathBenchmarks.Double*'
```

### System.MathBenchmarks.Double.Exp2

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Atan2

#### 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)