[Perf] Windows/x86: 2 Regressions on 6/11/2026 8:10:54 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [7d422286ca835eb58f14c9f00c9b28e35ff6414b](https://github.com/dotnet/runtime/commit/7d422286ca835eb58f14c9f00c9b28e35ff6414b)
Compare | [f59cad6eaf5bbe1c3da6aea07e998f686c0ef0bd](https://github.com/dotnet/runtime/commit/f59cad6eaf5bbe1c3da6aea07e998f686c0ef0bd)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7d422286ca835eb58f14c9f00c9b28e35ff6414b...f59cad6eaf5bbe1c3da6aea07e998f686c0ef0bd)
Configs | CompilationMode:tiered, RunKind:micro

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

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]()

| 236.78 μs | 327.35 μs | 1.38 | 0.36 | False | | |

![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_Rebar_Russian*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Rebar_Russian.Count(Pattern: "(?i)Шерлок Холмс", 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)

---

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [7d422286ca835eb58f14c9f00c9b28e35ff6414b](https://github.com/dotnet/runtime/commit/7d422286ca835eb58f14c9f00c9b28e35ff6414b)
Compare | [f59cad6eaf5bbe1c3da6aea07e998f686c0ef0bd](https://github.com/dotnet/runtime/commit/f59cad6eaf5bbe1c3da6aea07e998f686c0ef0bd)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7d422286ca835eb58f14c9f00c9b28e35ff6414b...f59cad6eaf5bbe1c3da6aea07e998f686c0ef0bd)
Configs | CompilationMode:tiered, RunKind:micro

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

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]()

| 271.04 μs | 374.54 μs | 1.38 | 0.33 | False | | |

![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_RustLang_Sherlock*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "(?i)the", Options: Compiled)

#### 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)