[Perf] Windows/x86: 2 Regressions on 5/26/2026 6:56:03 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [822530fb322cdf922c59e2a381994e885f24f051](https://github.com/dotnet/runtime/commit/822530fb322cdf922c59e2a381994e885f24f051)
Compare | [758abdf6906992c73adcd2c5ad8a1f5ecd0d70c7](https://github.com/dotnet/runtime/commit/758abdf6906992c73adcd2c5ad8a1f5ecd0d70c7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/822530fb322cdf922c59e2a381994e885f24f051...758abdf6906992c73adcd2c5ad8a1f5ecd0d70c7)
Configs | CompilationMode:tiered, RunKind:micro

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

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

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

| 25.13 ns | 33.67 ns | 1.34 | 0.62 | False | | |
|

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

| 27.44 ns | 32.93 ns | 1.20 | 0.50 | 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_NumberTensorPrimitives*'
```

### System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Double>.AddMultiply_ScalarMultiplier(BufferLength: 128)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Double>.MaxMagnitude_Vector(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)