[Perf] Linux/arm64: 1 Regression on 9/1/2026 5:15:28 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [eaf33d448f75e519da20083ac9392098964d7c74](https://github.com/dotnet/runtime/commit/eaf33d448f75e519da20083ac9392098964d7c74)
Compare | [600c5b67ae4680acf39f6e85529973930bda4168](https://github.com/dotnet/runtime/commit/600c5b67ae4680acf39f6e85529973930bda4168)
Diff | [Diff](https://github.com/dotnet/runtime/compare/eaf33d448f75e519da20083ac9392098964d7c74...600c5b67ae4680acf39f6e85529973930bda4168)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, 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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

• [Sinh - 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives*'
```

### System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Double>.Sinh(BufferLength: 3079)

#### 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.Numerics.Tensors/Perf_FloatingPointTensorPrimitives.cs#L55-L56 and run the provided benchmarks_ci.py filter on the stated configuration. Compare the baseline and test commits, then verify whether Sinh(BufferLength: 3079) reproduces the slowdown. Done means the regression is confirmed and its responsible change or explanation is documented.

Written by the indexing model from the issue text.