[Perf] Windows/x86: 2 Improvements on 3/11/2026 9:41:39 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [1e1bbed9856fd11f562d5e5b23b43b938e23f437](https://github.com/dotnet/runtime/commit/1e1bbed9856fd11f562d5e5b23b43b938e23f437)
Compare | [a1b5da138a21f545cadfcb03fcd0e27320a7a950](https://github.com/dotnet/runtime/commit/a1b5da138a21f545cadfcb03fcd0e27320a7a950)
Diff | [Diff](https://github.com/dotnet/runtime/compare/1e1bbed9856fd11f562d5e5b23b43b938e23f437...a1b5da138a21f545cadfcb03fcd0e27320a7a950)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Tests.StringReaderReadLineTests

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

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

| 55.44 μs | 46.54 μs | 0.84 | 0.44 | 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.IO.Tests.StringReaderReadLineTests*'
```

### System.IO.Tests.StringReaderReadLineTests.ReadLine(LineLengthRange: [ 1, 8])

#### 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 | [1e1bbed9856fd11f562d5e5b23b43b938e23f437](https://github.com/dotnet/runtime/commit/1e1bbed9856fd11f562d5e5b23b43b938e23f437)
Compare | [a1b5da138a21f545cadfcb03fcd0e27320a7a950](https://github.com/dotnet/runtime/commit/a1b5da138a21f545cadfcb03fcd0e27320a7a950)
Diff | [Diff](https://github.com/dotnet/runtime/compare/1e1bbed9856fd11f562d5e5b23b43b938e23f437...a1b5da138a21f545cadfcb03fcd0e27320a7a950)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Tests.StreamReaderReadLineTests

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

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

| 30.39 μs | 27.35 μs | 0.90 | 0.25 | 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.IO.Tests.StreamReaderReadLineTests*'
```

### System.IO.Tests.StreamReaderReadLineTests.ReadLineAsync(LineLengthRange: [ 9, 32])

#### 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)