[Perf] Linux/arm64: 1 Improvement on 6/1/2026 3:39:51 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [9931572ebc66a30b84de4c9232aac05c31f2a7c7](https://github.com/dotnet/runtime/commit/9931572ebc66a30b84de4c9232aac05c31f2a7c7)
Compare | [0dfd787f3c16e18e1641d20d8cce1789c9488b00](https://github.com/dotnet/runtime/commit/0dfd787f3c16e18e1641d20d8cce1789c9488b00)
Diff | [Diff](https://github.com/dotnet/runtime/compare/9931572ebc66a30b84de4c9232aac05c31f2a7c7...0dfd787f3c16e18e1641d20d8cce1789c9488b00)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in System.Tests.Perf_String

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

• [ToLower - 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.Tests.Perf_String*'
```

### System.Tests.Perf_String.ToLower(s: "This is a much longer piece of text that might benefit more from vectorization.")

#### 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)