[Perf] Linux/arm64: 2 Regressions on 2/25/2026 6:49:34 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [033999592b8a93a838f43dba43ac47a6a8943a66](https://github.com/dotnet/runtime/commit/033999592b8a93a838f43dba43ac47a6a8943a66)
Compare | [4a31f31508cdff37d5cd481367baea4f4d80df99](https://github.com/dotnet/runtime/commit/4a31f31508cdff37d5cd481367baea4f4d80df99)
Diff | [Diff](https://github.com/dotnet/runtime/compare/033999592b8a93a838f43dba43ac47a6a8943a66...4a31f31508cdff37d5cd481367baea4f4d80df99)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Text.RegularExpressions.Tests.Perf_Regex_Industry_SliceSlice

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]()

| 1.37 secs | 2.48 secs | 1.81 | 0.00 | False | | |
|

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

| 1.80 secs | 2.89 secs | 1.61 | 0.07 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.RegularExpressions.Tests.Perf_Regex_Industry_SliceSlice*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_SliceSlice.Count(Options: IgnoreCase, Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_SliceSlice.Count(Options: IgnoreCase, 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)