[Perf] Windows/x86: 3 Improvements on 7/1/2026 9:59:07 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [88e2ee68affb2e6e71727630df8833dced0875f4](https://github.com/dotnet/runtime/commit/88e2ee68affb2e6e71727630df8833dced0875f4)
Compare | [2ca5bd514647fe0e961dd237dc9af0004479da6f](https://github.com/dotnet/runtime/commit/2ca5bd514647fe0e961dd237dc9af0004479da6f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/88e2ee68affb2e6e71727630df8833dced0875f4...2ca5bd514647fe0e961dd237dc9af0004479da6f)
Configs | CompilationMode:tiered, RunKind:micro

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

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

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

| 157.19 ms | 38.43 ms | 0.24 | 0.76 | 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_Cache*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Cache.IsMatch(total: 400000, unique: 7, cacheSize: 15)

#### 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 | [47fb65f4ea20e3884f94534924a87bb87f1db905](https://github.com/dotnet/runtime/commit/47fb65f4ea20e3884f94534924a87bb87f1db905)
Compare | [2ca5bd514647fe0e961dd237dc9af0004479da6f](https://github.com/dotnet/runtime/commit/2ca5bd514647fe0e961dd237dc9af0004479da6f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/47fb65f4ea20e3884f94534924a87bb87f1db905...2ca5bd514647fe0e961dd237dc9af0004479da6f)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Globalization.Tests.StringSearch

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

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

| 18.68 ns | 16.29 ns | 0.87 | 0.03 | 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.Globalization.Tests.StringSearch*'
```

### System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options: (en-US, OrdinalIgnoreCase, False))

#### 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 | [88e2ee68affb2e6e71727630df8833dced0875f4](https://github.com/dotnet/runtime/commit/88e2ee68affb2e6e71727630df8833dced0875f4)
Compare | [2ca5bd514647fe0e961dd237dc9af0004479da6f](https://github.com/dotnet/runtime/commit/2ca5bd514647fe0e961dd237dc9af0004479da6f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/88e2ee68affb2e6e71727630df8833dced0875f4...2ca5bd514647fe0e961dd237dc9af0004479da6f)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Perf_Convert

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

• [FromHexString - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 46.52 ns | 13.11 ns | 0.28 | 0.01 | 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.Perf_Convert*'
```

### System.Perf_Convert.FromHexString

#### 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 three benchmark sources: Perf.Regex.Cache.cs, StringSearch.cs, and the System.Perf_Convert benchmark referenced in the issue. Run the provided benchmarks_ci.py commands and inspect the linked test reports and baseline comparisons. Done means identifying whether these reported Windows/x86 improvements require runtime follow-up or can be closed as expected results.

Written by the indexing model from the issue text.