[Perf] Windows/x86: 2 Regressions on 4/30/2026 7:21:50 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [7fe7b6f9ee530920febbabdfdc9c2cadbab3348e](https://github.com/dotnet/runtime/commit/7fe7b6f9ee530920febbabdfdc9c2cadbab3348e)
Compare | [dd17b6dcc548fed9998e4f76c8708b57c5e5dd78](https://github.com/dotnet/runtime/commit/dd17b6dcc548fed9998e4f76c8708b57c5e5dd78)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7fe7b6f9ee530920febbabdfdc9c2cadbab3348e...dd17b6dcc548fed9998e4f76c8708b57c5e5dd78)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Collections.ContainsTrue<String>

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

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

| 107.59 μs | 125.82 μs | 1.17 | 0.40 | 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.Collections.ContainsTrue*'
```

### System.Collections.ContainsTrue<String>.Queue(Size: 512)

#### 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 | [7fe7b6f9ee530920febbabdfdc9c2cadbab3348e](https://github.com/dotnet/runtime/commit/7fe7b6f9ee530920febbabdfdc9c2cadbab3348e)
Compare | [dd17b6dcc548fed9998e4f76c8708b57c5e5dd78](https://github.com/dotnet/runtime/commit/dd17b6dcc548fed9998e4f76c8708b57c5e5dd78)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7fe7b6f9ee530920febbabdfdc9c2cadbab3348e...dd17b6dcc548fed9998e4f76c8708b57c5e5dd78)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Threading.Tests.Perf_SemaphoreSlim

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

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

| 2.25 μs | 2.50 μs | 1.11 | 0.61 | 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.Threading.Tests.Perf_SemaphoreSlim*'
```

### System.Threading.Tests.Perf_SemaphoreSlim.ReleaseWaitAsync_WithCancellationTokenAndTimeout

#### 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)