[Perf] Windows/x64: 3 Improvements on 1/12/2026 7:53:53 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [494093ad31670236299b9cc87f5c1e1d8e0d97d2](https://github.com/dotnet/runtime/commit/494093ad31670236299b9cc87f5c1e1d8e0d97d2)
Compare | [3211693c5d1875116571962d5d0e3cf401148660](https://github.com/dotnet/runtime/commit/3211693c5d1875116571962d5d0e3cf401148660)
Diff | [Diff](https://github.com/dotnet/runtime/compare/494093ad31670236299b9cc87f5c1e1d8e0d97d2...3211693c5d1875116571962d5d0e3cf401148660)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Uri

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

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

| 539.92 ns | 483.05 ns | 0.89 | 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.Tests.Perf_Uri*'
```

### System.Tests.Perf_Uri.CtorIdnHostPathAndQuery(input: "http://host/path%20with%20escapable%20values?key=%C3%BCnicode")

#### 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 | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ee0d069f937b187c1e79b958536c80dfb1f9ad6b](https://github.com/dotnet/runtime/commit/ee0d069f937b187c1e79b958536c80dfb1f9ad6b)
Compare | [3211693c5d1875116571962d5d0e3cf401148660](https://github.com/dotnet/runtime/commit/3211693c5d1875116571962d5d0e3cf401148660)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ee0d069f937b187c1e79b958536c80dfb1f9ad6b...3211693c5d1875116571962d5d0e3cf401148660)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in PerfLabTests.EnumPerf

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

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

| 17.98 ns | 0.00 ns | 0.00 | 0.39 | 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 'PerfLabTests.EnumPerf*'
```

### PerfLabTests.EnumPerf.EnumEquals

#### 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 | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ee0d069f937b187c1e79b958536c80dfb1f9ad6b](https://github.com/dotnet/runtime/commit/ee0d069f937b187c1e79b958536c80dfb1f9ad6b)
Compare | [d8182b21fbef8265dc83c638b1d1509499846c64](https://github.com/dotnet/runtime/commit/d8182b21fbef8265dc83c638b1d1509499846c64)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ee0d069f937b187c1e79b958536c80dfb1f9ad6b...d8182b21fbef8265dc83c638b1d1509499846c64)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_String

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

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

| 38.43 ns | 23.45 ns | 0.61 | 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.Tests.Perf_String*'
```

### System.Tests.Perf_String.IndexerCheckBoundCheckHoist

#### 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 benchmark sources at src/benchmarks/micro/libraries/System.Runtime/Perf.Uri.cs, Perf.String.cs, and src/benchmarks/micro/runtime/perflab/EnumPerf.cs. Run the issue's benchmarks_ci.py commands and compare the linked reports and baseline/compare commits. Done means identifying whether the reported improvements require a runtime change, benchmark change, or no action, with the result validated by the relevant benchmark.

Written by the indexing model from the issue text.