[Perf] Linux/x64: 3 Regressions on 5/14/2026 3:56:57 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [863e48f6a3667cda03ac5dbfa55e85845d08d1cf](https://github.com/dotnet/runtime/commit/863e48f6a3667cda03ac5dbfa55e85845d08d1cf)
Compare | [a90a27410b5075ea71c3c4c90e44b643a535cecb](https://github.com/dotnet/runtime/commit/a90a27410b5075ea71c3c4c90e44b643a535cecb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/863e48f6a3667cda03ac5dbfa55e85845d08d1cf...a90a27410b5075ea71c3c4c90e44b643a535cecb)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

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

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]()

| 363.12 μs | 387.39 μs | 1.07 | 0.14 | 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<BigStruct, BigStruct>.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)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [863e48f6a3667cda03ac5dbfa55e85845d08d1cf](https://github.com/dotnet/runtime/commit/863e48f6a3667cda03ac5dbfa55e85845d08d1cf)
Compare | [a90a27410b5075ea71c3c4c90e44b643a535cecb](https://github.com/dotnet/runtime/commit/a90a27410b5075ea71c3c4c90e44b643a535cecb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/863e48f6a3667cda03ac5dbfa55e85845d08d1cf...a90a27410b5075ea71c3c4c90e44b643a535cecb)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.Tests.Perf_Enum

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

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

| 77.48 ns | 85.35 ns | 1.10 | 0.19 | 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.Tests.Perf_Enum*'
```

### System.Tests.Perf_Enum.ToString_Flags(value: 32)

#### 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 | [863e48f6a3667cda03ac5dbfa55e85845d08d1cf](https://github.com/dotnet/runtime/commit/863e48f6a3667cda03ac5dbfa55e85845d08d1cf)
Compare | [a90a27410b5075ea71c3c4c90e44b643a535cecb](https://github.com/dotnet/runtime/commit/a90a27410b5075ea71c3c4c90e44b643a535cecb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/863e48f6a3667cda03ac5dbfa55e85845d08d1cf...a90a27410b5075ea71c3c4c90e44b643a535cecb)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.IO.Tests.Perf_RandomAccess

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

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

| 587.57 ms | 644.77 ms | 1.10 | 0.18 | 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.IO.Tests.Perf_RandomAccess*'
```

### System.IO.Tests.Perf_RandomAccess.WriteGather(fileSize: 104857600, buffersSize: 65536, options: Asynchronous)

#### 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)