[Perf] Windows/x86: 2 Regressions on 5/26/2026 11:45:59 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ab105560973714f1f0f1e8d75583f64c78a49fc4](https://github.com/dotnet/runtime/commit/ab105560973714f1f0f1e8d75583f64c78a49fc4)
Compare | [9825f560663da0b6ac4c88ecf5286bd932bf7c29](https://github.com/dotnet/runtime/commit/9825f560663da0b6ac4c88ecf5286bd932bf7c29)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ab105560973714f1f0f1e8d75583f64c78a49fc4...9825f560663da0b6ac4c88ecf5286bd932bf7c29)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Double>

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

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

| 26.58 ns | 33.19 ns | 1.25 | 0.53 | False | | |
|

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

| 543.52 ns | 577.62 ns | 1.06 | 0.54 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives*'
```

### System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Double>.FusedMultiplyAdd_ScalarMultiplier(BufferLength: 128)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Double>.Sigmoid(BufferLength: 128)

#### 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)