dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 85 Regressions on 5/22/2026 6:00:45 PM +00:00

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arch-wasm arch-x64 branch-refs/heads/main compilationmode-wasm kind-micro os-linux perf-regression runkind-micro runtimetype-coreclr triage-error untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [4a84da2cda2a2d7425d5f30204bc0d4a84aadef0](https://github.com/dotnet/runtime/commit/4a84da2cda2a2d7425d5f30204bc0d4a84aadef0)
Compare | [3a1a86525ba8649767249acefa9cad7abeaa4fe4](https://github.com/dotnet/runtime/commit/3a1a86525ba8649767249acefa9cad7abeaa4fe4)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4a84da2cda2a2d7425d5f30204bc0d4a84aadef0...3a1a86525ba8649767249acefa9cad7abeaa4fe4)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Numerics.Tests.Perf_VectorOf<UInt64>

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

  • [BitwiseOrBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.38 μs | 2.78 μs | 1.17 | 0.25 | False | | |
|
  • [ZeroBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 129.64 ns | 151.04 ns | 1.17 | 0.41 | False | | |
|
  • [CountBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 108.63 ns | 123.41 ns | 1.14 | 0.45 | False | | |
|
  • [AndNotBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.89 μs | 4.32 μs | 1.11 | 0.29 | False | | |
|
  • [XorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.31 μs | 2.56 μs | 1.11 | 0.28 | False | | |
|
  • [OnesComplementOperatorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.67 μs | 1.84 μs | 1.10 | 0.26 | False | | |
|
  • [BitwiseAndOperatorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.27 μs | 2.50 μs | 1.10 | 0.30 | False | | |
|
  • [ConditionalSelectBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 8.16 μs | 8.91 μs | 1.09 | 0.31 | False | | |
|
  • [ExclusiveOrOperatorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.29 μs | 2.48 μs | 1.08 | 0.34 | False | | |
|
  • [OnesComplementBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.67 μs | 1.81 μs | 1.08 | 0.30 | False | | |

![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![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.Numerics.Tests.Perf_VectorOf*'
```

### System.Numerics.Tests.Perf_VectorOf<UInt64>.BitwiseOrBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.ZeroBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.CountBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.AndNotBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.XorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.OnesComplementOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.BitwiseAndOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.ConditionalSelectBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.ExclusiveOrOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<UInt64>.OnesComplementBenchmark

#### 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 | [4a84da2cda2a2d7425d5f30204bc0d4a84aadef0](https://github.com/dotnet/runtime/commit/4a84da2cda2a2d7425d5f30204bc0d4a84aadef0)
Compare | [3a1a86525ba8649767249acefa9cad7abeaa4fe4](https://github.com/dotnet/runtime/commit/3a1a86525ba8649767249acefa9cad7abeaa4fe4)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4a84da2cda2a2d7425d5f30204bc0d4a84aadef0...3a1a86525ba8649767249acefa9cad7abeaa4fe4)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Numerics.Tests.Perf_VectorOf<Int32>

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

  • [CountBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 79.69 ns | 96.59 ns | 1.21 | 0.30 | False | | |
|
  • [ZeroBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 101.01 ns | 118.60 ns | 1.17 | 0.29 | False | | |
|
  • [BitwiseOrOperatorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.12 μs | 2.38 μs | 1.12 | 0.28 | False | | |
|
  • [AndNotBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.62 μs | 4.01 μs | 1.11 | 0.24 | False | | |
|
  • [XorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.18 μs | 2.41 μs | 1.10 | 0.28 | False | | |
|
  • [BitwiseAndBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.20 μs | 2.42 μs | 1.10 | 0.29 | False | | |
|
  • [BitwiseAndOperatorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.16 μs | 2.37 μs | 1.10 | 0.26 | False | | |
|
  • [ConditionalSelectBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 7.63 μs | 8.37 μs | 1.10 | 0.29 | False | | |
|
  • [OnesComplementOperatorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.53 μs | 1.68 μs | 1.10 | 0.27 | False | | |
|
  • [OneBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 954.68 ns | 1026.37 ns | 1.08 | 0.31 | False | | |

![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![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.Numerics.Tests.Perf_VectorOf*'
```

### System.Numerics.Tests.Perf_VectorOf<Int32>.CountBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.ZeroBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.BitwiseOrOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.AndNotBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.XorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.BitwiseAndBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.BitwiseAndOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.ConditionalSelectBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.OnesComplementOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int32>.OneBenchmark

#### 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 | [4a84da2cda2a2d7425d5f30204bc0d4a84aadef0](https://github.com/dotnet/runtime/commit/4a84da2cda2a2d7425d5f30204bc0d4a84aadef0)
Compare | [3a1a86525ba8649767249acefa9cad7abeaa4fe4](https://github.com/dotnet/runtime/commit/3a1a86525ba8649767249acefa9cad7abeaa4fe4)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4a84da2cda2a2d7425d5f30204bc0d4a84aadef0...3a1a86525ba8649767249acefa9cad7abeaa4fe4)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Numerics.Tests.Perf_VectorOf<Int16>

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

  • [CountBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 74.32 ns | 88.57 ns | 1.19 | 0.30 | False | | |
|
  • [ZeroBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 96.97 ns | 112.69 ns | 1.16 | 0.30 | False | | |
|
  • [ConditionalSelectBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 7.60 μs | 8.43 μs | 1.11 | 0.22 | False | | |
|
  • [ExclusiveOrOperatorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.12 μs | 2.34 μs | 1.10 | 0.27 | False | | |
|
  • [OneBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.67 μs | 1.84 μs | 1.10 | 0.25 | False | | |
|
  • [OnesComplementBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.56 μs | 1.71 μs | 1.10 | 0.31 | False | | |
|
  • [XorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.19 μs | 2.39 μs | 1.09 | 0.26 | False | | |
|
  • [AndNotBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.59 μs | 3.90 μs | 1.09 | 0.27 | False | | |

![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![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.Numerics.Tests.Perf_VectorOf*'
```

### System.Numerics.Tests.Perf_VectorOf<Int16>.CountBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int16>.ZeroBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int16>.ConditionalSelectBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int16>.ExclusiveOrOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int16>.OneBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int16>.OnesComplementBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int16>.XorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_VectorOf<Int16>.AndNotBenchmark

#### 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)

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