[Perf] Linux/arm64: 1 Improvement on 7/6/2026 3:49:29 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [e2b6af55b06bfeab9fa30e7e9a6d9a0fb83850e3](https://github.com/dotnet/runtime/commit/e2b6af55b06bfeab9fa30e7e9a6d9a0fb83850e3)
Compare | [22439c05e7608d5396e0b55144849f360d7b5475](https://github.com/dotnet/runtime/commit/22439c05e7608d5396e0b55144849f360d7b5475)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e2b6af55b06bfeab9fa30e7e9a6d9a0fb83850e3...22439c05e7608d5396e0b55144849f360d7b5475)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig

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

• [Count - 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.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig.Count(Pattern: ".{0,2}(Tom|Sawyer|Huckleberry|Finn)", Options: NonBacktracking)

#### 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 linked benchmark source at src/benchmarks/micro/libraries/System.Text.RegularExpressions/Perf.Regex.Industry.cs and reproduce it with the provided benchmarks_ci.py command. Compare the baseline and test reports for the ARM64 AzureLinux configuration; the issue does not define a code change or success condition beyond investigating the reported performance result.

Written by the indexing model from the issue text.