[Perf] Linux/x64: 2 Regressions on 5/12/2026 1:07:20 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [4bdd9f8488636fae5084626fcaf74d827599d6f1](https://github.com/dotnet/runtime/commit/4bdd9f8488636fae5084626fcaf74d827599d6f1)
Compare | [3caa97ab2ceaf0185ca6de09c6cc497dccfe6f3e](https://github.com/dotnet/runtime/commit/3caa97ab2ceaf0185ca6de09c6cc497dccfe6f3e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4bdd9f8488636fae5084626fcaf74d827599d6f1...3caa97ab2ceaf0185ca6de09c6cc497dccfe6f3e)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

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

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

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

| 4.12 ms | 5.21 ms | 1.27 | 0.35 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.ContainsTrueComparer*'
```

### System.Collections.ContainsTrueComparer<String>.HashSet(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 | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [4bdd9f8488636fae5084626fcaf74d827599d6f1](https://github.com/dotnet/runtime/commit/4bdd9f8488636fae5084626fcaf74d827599d6f1)
Compare | [3caa97ab2ceaf0185ca6de09c6cc497dccfe6f3e](https://github.com/dotnet/runtime/commit/3caa97ab2ceaf0185ca6de09c6cc497dccfe6f3e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4bdd9f8488636fae5084626fcaf74d827599d6f1...3caa97ab2ceaf0185ca6de09c6cc497dccfe6f3e)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

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

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

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

| 485.46 μs | 816.87 μs | 1.68 | 0.41 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.AddGivenSize*'
```

### System.Collections.AddGivenSize<String>.ICollection(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)