[Perf] Linux/x64: 2 Regressions on 7/21/2026 10:06:44 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [7e3626903d758fab196fa09782a7e198a985bf36](https://github.com/dotnet/runtime/commit/7e3626903d758fab196fa09782a7e198a985bf36)
Compare | [56c76e2f3594e2b6208c8bf61f5dda0eb476e353](https://github.com/dotnet/runtime/commit/56c76e2f3594e2b6208c8bf61f5dda0eb476e353)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7e3626903d758fab196fa09782a7e198a985bf36...56c76e2f3594e2b6208c8bf61f5dda0eb476e353)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

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

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

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

| 15.78 ms | 24.07 ms | 1.53 | 0.31 | 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.ContainsFalse*'
```

### System.Collections.ContainsFalse<String>.SortedSet(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 | [7e3626903d758fab196fa09782a7e198a985bf36](https://github.com/dotnet/runtime/commit/7e3626903d758fab196fa09782a7e198a985bf36)
Compare | [56c76e2f3594e2b6208c8bf61f5dda0eb476e353](https://github.com/dotnet/runtime/commit/56c76e2f3594e2b6208c8bf61f5dda0eb476e353)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7e3626903d758fab196fa09782a7e198a985bf36...56c76e2f3594e2b6208c8bf61f5dda0eb476e353)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.TryGetValueFalse<SmallClass, SmallClass>

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

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

| 681.96 μs | 904.00 μs | 1.33 | 0.24 | 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.TryGetValueFalse*'
```

### System.Collections.TryGetValueFalse<SmallClass, SmallClass>.FrozenDictionaryOptimized(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)

Start with the benchmark sources in src/benchmarks/micro/libraries/System.Collections/Contains/ContainsFalse.cs and TryGetValue/TryGetValueFalse.cs, then run the provided benchmarks under CompilationMode:wasm. Compare the baseline and test reports for both regressions and use the profiling workflow documentation to investigate. Done means the regressions are explained or corrected and the benchmarks confirm the improvement.

Written by the indexing model from the issue text.