[Perf] Linux/arm64: 1 Improvement on 5/20/2026 11:46:12 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [a49d0cf4bb262a0bb8a2ece002155cd0a4829dbd](https://github.com/dotnet/runtime/commit/a49d0cf4bb262a0bb8a2ece002155cd0a4829dbd)
Compare | [48a921283413c94a8153e0c1d7ab6aadf2952580](https://github.com/dotnet/runtime/commit/48a921283413c94a8153e0c1d7ab6aadf2952580)
Diff | [Diff](https://github.com/dotnet/runtime/compare/a49d0cf4bb262a0bb8a2ece002155cd0a4829dbd...48a921283413c94a8153e0c1d7ab6aadf2952580)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in System.Text.Perf_Ascii

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

• [IsValid_Chars - 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.Text.Perf_Ascii*'
```

### System.Text.Perf_Ascii.IsValid_Chars(Size: 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)