dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 7 Regressions on 2/25/2026 10:19:01 PM +00:00

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arch-wasm arch-x64 branch-refs/heads/main kind-micro os-linux perf-regression PGO untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [c4066cf778a3fde110c0ab6691baa941d95a5e0c](https://github.com/dotnet/runtime/commit/c4066cf778a3fde110c0ab6691baa941d95a5e0c)
Compare | [e5dde0cb50d5827d38008f414a35e9a54c65ac0e](https://github.com/dotnet/runtime/commit/e5dde0cb50d5827d38008f414a35e9a54c65ac0e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c4066cf778a3fde110c0ab6691baa941d95a5e0c...e5dde0cb50d5827d38008f414a35e9a54c65ac0e)
Configs | CompilationMode:wasm, RunKind:micro

### Regressions in System.Tests.Perf_Guid

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

  • [EqualsNotSame - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 9.84 ns | 18.48 ns | 1.88 | 0.34 | False | | |
|
  • [EqualsOperator - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 9.21 ns | 17.58 ns | 1.91 | 0.32 | False | | |
|
  • [NotEqualsOperator - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 9.89 ns | 19.38 ns | 1.96 | 0.40 | False | | |
|
  • [EqualsSame - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 9.93 ns | 26.49 ns | 2.67 | 0.44 | False | | |

![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.Tests.Perf_Guid*'
```

### System.Tests.Perf_Guid.EqualsNotSame

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.EqualsOperator

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.NotEqualsOperator

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.EqualsSame

#### 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 | [c4066cf778a3fde110c0ab6691baa941d95a5e0c](https://github.com/dotnet/runtime/commit/c4066cf778a3fde110c0ab6691baa941d95a5e0c)
Compare | [e5dde0cb50d5827d38008f414a35e9a54c65ac0e](https://github.com/dotnet/runtime/commit/e5dde0cb50d5827d38008f414a35e9a54c65ac0e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c4066cf778a3fde110c0ab6691baa941d95a5e0c...e5dde0cb50d5827d38008f414a35e9a54c65ac0e)
Configs | CompilationMode:wasm, RunKind:micro

### Regressions in System.Tests.Perf_GC<Byte>

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

  • [NewOperator_Array - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 49.35 ns | 54.53 ns | 1.11 | 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.Tests.Perf_GC*'
```

### System.Tests.Perf_GC<Byte>.NewOperator_Array(length: 1000)

#### 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 | [c4066cf778a3fde110c0ab6691baa941d95a5e0c](https://github.com/dotnet/runtime/commit/c4066cf778a3fde110c0ab6691baa941d95a5e0c)
Compare | [e5dde0cb50d5827d38008f414a35e9a54c65ac0e](https://github.com/dotnet/runtime/commit/e5dde0cb50d5827d38008f414a35e9a54c65ac0e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c4066cf778a3fde110c0ab6691baa941d95a5e0c...e5dde0cb50d5827d38008f414a35e9a54c65ac0e)
Configs | CompilationMode:wasm, RunKind:micro

### Regressions in System.Tests.Perf_Object

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

  • [GetType_ - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 9.22 ns | 16.79 ns | 1.82 | 0.53 | False | | |
|
  • [ctor - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 11.93 ns | 24.79 ns | 2.08 | 0.39 | False | | |

![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.Tests.Perf_Object*'
```

### System.Tests.Perf_Object.GetType_

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Object.ctor

#### 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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