[Perf] Linux/x64: 2 Regressions on 4/6/2026 8:44:22 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [fe397b549e97b2733ad020da8e493d9a29d29618](https://github.com/dotnet/sdk/commit/fe397b549e97b2733ad020da8e493d9a29d29618)
Compare | [1a405c76db678301b6f6f5b22d2a63a152c26b97](https://github.com/dotnet/sdk/commit/1a405c76db678301b6f6f5b22d2a63a152c26b97)
Diff | [Diff](https://github.com/dotnet/sdk/compare/fe397b549e97b2733ad020da8e493d9a29d29618...1a405c76db678301b6f6f5b22d2a63a152c26b97)
Configs | CompilationMode:tiered, RunKind:mlnet

### Regressions in Microsoft.ML.Benchmarks.HashBench

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

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

| 5.45 ms | 6.79 ms | 1.25 | 0.00 | True | | |

[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 'Microsoft.ML.Benchmarks.HashBench*'
```

### Microsoft.ML.Benchmarks.HashBench.HashVectorFloat

#### 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 | [fe397b549e97b2733ad020da8e493d9a29d29618](https://github.com/dotnet/sdk/commit/fe397b549e97b2733ad020da8e493d9a29d29618)
Compare | [1a405c76db678301b6f6f5b22d2a63a152c26b97](https://github.com/dotnet/sdk/commit/1a405c76db678301b6f6f5b22d2a63a152c26b97)
Diff | [Diff](https://github.com/dotnet/sdk/compare/fe397b549e97b2733ad020da8e493d9a29d29618...1a405c76db678301b6f6f5b22d2a63a152c26b97)
Configs | CompilationMode:tiered, RunKind:mlnet

### Regressions in Microsoft.ML.Benchmarks.PredictionEngineBench

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

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

| 45.50 ns | 51.91 ns | 1.14 | 0.00 | True | | |

[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 'Microsoft.ML.Benchmarks.PredictionEngineBench*'
```

### Microsoft.ML.Benchmarks.PredictionEngineBench.MakeBreastCancerPredictions

#### 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)