dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 6 Regressions on 3/27/2026 5:55:23 PM +00:00

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

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [e5f4006c045d0054f6cc507591018448211236ea](https://github.com/dotnet/runtime/commit/e5f4006c045d0054f6cc507591018448211236ea)
Compare | [b9e773ce854dab29e7a410b1264af2bef68416fb](https://github.com/dotnet/runtime/commit/b9e773ce854dab29e7a410b1264af2bef68416fb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e5f4006c045d0054f6cc507591018448211236ea...b9e773ce854dab29e7a410b1264af2bef68416fb)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.ContainsFalse<String>

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

  • [SortedSet - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 17.73 ms | 26.20 ms | 1.48 | 0.25 | False | | |

[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.ContainsFalse*'
```

### System.Collections.ContainsFalse<String>.SortedSet(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 | [e5f4006c045d0054f6cc507591018448211236ea](https://github.com/dotnet/runtime/commit/e5f4006c045d0054f6cc507591018448211236ea)
Compare | [b9e773ce854dab29e7a410b1264af2bef68416fb](https://github.com/dotnet/runtime/commit/b9e773ce854dab29e7a410b1264af2bef68416fb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e5f4006c045d0054f6cc507591018448211236ea...b9e773ce854dab29e7a410b1264af2bef68416fb)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.ContainsTrueComparer<String>

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

  • [FrozenSet - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.78 ms | 4.10 ms | 1.09 | 0.34 | False | | |

[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.ContainsTrueComparer*'
```

### System.Collections.ContainsTrueComparer<String>.FrozenSet(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 | [e5f4006c045d0054f6cc507591018448211236ea](https://github.com/dotnet/runtime/commit/e5f4006c045d0054f6cc507591018448211236ea)
Compare | [b9e773ce854dab29e7a410b1264af2bef68416fb](https://github.com/dotnet/runtime/commit/b9e773ce854dab29e7a410b1264af2bef68416fb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/e5f4006c045d0054f6cc507591018448211236ea...b9e773ce854dab29e7a410b1264af2bef68416fb)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.Sort<IntClass>

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

  • [Array_ComparerClass - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 5.42 ms | 6.62 ms | 1.22 | 0.31 | False | | |
|
  • [Array - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 5.48 ms | 6.56 ms | 1.20 | 0.35 | False | | |
|
  • [List - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 5.35 ms | 7.53 ms | 1.41 | 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.Sort*'
```

### System.Collections.Sort<IntClass>.Array_ComparerClass(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Sort<IntClass>.Array(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Sort<IntClass>.List(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 | [67495bce3f413302a4f47820c03d81b67897da7c](https://github.com/dotnet/runtime/commit/67495bce3f413302a4f47820c03d81b67897da7c)
Compare | [b9e773ce854dab29e7a410b1264af2bef68416fb](https://github.com/dotnet/runtime/commit/b9e773ce854dab29e7a410b1264af2bef68416fb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/67495bce3f413302a4f47820c03d81b67897da7c...b9e773ce854dab29e7a410b1264af2bef68416fb)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Linq.Tests.Perf_OrderBy

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

  • [OrderByString - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 10.47 ms | 13.18 ms | 1.26 | 0.34 | False | | |

[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.Linq.Tests.Perf_OrderBy*'
```

### System.Linq.Tests.Perf_OrderBy.OrderByString(NumberOfPeople: 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)

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