[Perf] Linux/x64: 2 Regressions on 4/29/2026 5:45:57 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [1d02af45d41c1fefa5ec4c139295081092af0905](https://github.com/dotnet/runtime/commit/1d02af45d41c1fefa5ec4c139295081092af0905)
Compare | [6df7b63c607b6ac9e100831c07349d907e78bbd5](https://github.com/dotnet/runtime/commit/6df7b63c607b6ac9e100831c07349d907e78bbd5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/1d02af45d41c1fefa5ec4c139295081092af0905...6df7b63c607b6ac9e100831c07349d907e78bbd5)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

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

| 6.61 ms | 11.14 ms | 1.69 | 0.12 | 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.Read(fileSize: 104857600, bufferSize: 16384, options: None)

#### 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 | [1d02af45d41c1fefa5ec4c139295081092af0905](https://github.com/dotnet/runtime/commit/1d02af45d41c1fefa5ec4c139295081092af0905)
Compare | [6df7b63c607b6ac9e100831c07349d907e78bbd5](https://github.com/dotnet/runtime/commit/6df7b63c607b6ac9e100831c07349d907e78bbd5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/1d02af45d41c1fefa5ec4c139295081092af0905...6df7b63c607b6ac9e100831c07349d907e78bbd5)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in PerfLabTests.LowLevelPerf

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

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

| 5.03 ms | 6.38 ms | 1.27 | 0.22 | 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 'PerfLabTests.LowLevelPerf*'
```

### PerfLabTests.LowLevelPerf.InterfaceInterfaceMethod

#### 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)