[Perf] Windows/x86: 4 Improvements on 2/25/2026 10:07:54 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [df9f2603d4f36d340b17abced2cc0fb046278c4f](https://github.com/dotnet/runtime/commit/df9f2603d4f36d340b17abced2cc0fb046278c4f)
Compare | [133c7bde3fb7dd914f423ffb3e408cc61787e0bb](https://github.com/dotnet/runtime/commit/133c7bde3fb7dd914f423ffb3e408cc61787e0bb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/df9f2603d4f36d340b17abced2cc0fb046278c4f...133c7bde3fb7dd914f423ffb3e408cc61787e0bb)
Configs | CompilationMode:tiered, RunKind:micro

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

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

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

| 2.45 μs | 1.82 μs | 0.74 | 0.03 | False | | |
|

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

| 117.54 ns | 85.13 ns | 0.72 | 0.06 | False | | |
|

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

| 2.66 μs | 2.04 μs | 0.76 | 0.04 | False | | |
|

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

| 2.69 μs | 1.66 μs | 0.62 | 0.04 | False | | |

[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_Common*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.MatchesWords(Options: Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.MatchWord(Options: Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.SplitWords(Options: Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.ReplaceWords(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)