[Perf] Linux/x64: 2 Regressions on 4/12/2026 2:38:40 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [4fd3283754e18266bcfde2f3279656d655018a81](https://github.com/dotnet/runtime/commit/4fd3283754e18266bcfde2f3279656d655018a81)
Compare | [c2862f93479e76e0e5c43996836c4f067fdbae25](https://github.com/dotnet/runtime/commit/c2862f93479e76e0e5c43996836c4f067fdbae25)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4fd3283754e18266bcfde2f3279656d655018a81...c2862f93479e76e0e5c43996836c4f067fdbae25)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in Interop.StructureToPtr

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

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

| 3.87 μs | 5.46 μs | 1.41 | 0.24 | False | | |

[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 'Interop.StructureToPtr*'
```

### Interop.StructureToPtr.MarshalPtrToStructure

#### 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 | [4fd3283754e18266bcfde2f3279656d655018a81](https://github.com/dotnet/runtime/commit/4fd3283754e18266bcfde2f3279656d655018a81)
Compare | [c2862f93479e76e0e5c43996836c4f067fdbae25](https://github.com/dotnet/runtime/commit/c2862f93479e76e0e5c43996836c4f067fdbae25)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4fd3283754e18266bcfde2f3279656d655018a81...c2862f93479e76e0e5c43996836c4f067fdbae25)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.Perf_SingleCharFrozenDictionary

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

• [ToFrozenDictionary - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 33.10 ms | 39.57 ms | 1.20 | 0.28 | False | | |

[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.Perf_SingleCharFrozenDictionary*'
```

### System.Collections.Perf_SingleCharFrozenDictionary.ToFrozenDictionary(Count: 10000)

#### 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)