[Perf] Linux/x64: 2 Regressions on 9/2/2026 5:37:42 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [f00a5ba2dde9f648bcd9ac77411d1a8596449303](https://github.com/dotnet/runtime/commit/f00a5ba2dde9f648bcd9ac77411d1a8596449303)
Compare | [696fda84063459254633ad07bf8ce1e6977c9ad5](https://github.com/dotnet/runtime/commit/696fda84063459254633ad07bf8ce1e6977c9ad5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f00a5ba2dde9f648bcd9ac77411d1a8596449303...696fda84063459254633ad07bf8ce1e6977c9ad5)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.TryGetValueTrue<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]()

| 1.58 ms | 2.34 ms | 1.49 | 0.34 | False | | |
|

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

| 13.19 ms | 19.43 ms | 1.47 | 0.33 | False | | |

![graph]()
![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.TryGetValueTrue*'
```

### System.Collections.TryGetValueTrue<SmallClass, SmallClass>.FrozenDictionaryOptimized(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.TryGetValueTrue<SmallClass, SmallClass>.SortedDictionary(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 dotnet/performance/src/benchmarks/micro/libraries/System.Collections/TryGetValue/TryGetValueTrue.cs at the linked lines, then compare the baseline and test commits and follow the profiling workflow documentation. Run the provided benchmarks_ci.py command for the filter; done means the regression is understood and any fix is validated against the affected FrozenDictionaryOptimized and SortedDictionary benchmarks.

Written by the indexing model from the issue text.