dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/arm64: 4 Improvements on 5/29/2026 4:57:49 PM +00:00

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arch-arm64 branch-refs/heads/main compilationmode-tiered kind-micro Noise os-linux perf-improvement runkind-micro runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [760c770a3c5427b1811a978f1252e2ed2bc9d110](https://github.com/dotnet/runtime/commit/760c770a3c5427b1811a978f1252e2ed2bc9d110)
Compare | [675aea5d3297eadb749d160ee2086586acf79fd9](https://github.com/dotnet/runtime/commit/675aea5d3297eadb749d160ee2086586acf79fd9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/760c770a3c5427b1811a978f1252e2ed2bc9d110...675aea5d3297eadb749d160ee2086586acf79fd9)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Threading.Tests.Perf_CancellationToken

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

  • [CreateLinkedTokenSource1 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 51.13 ns | 45.81 ns | 0.90 | 0.23 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Threading.Tests.Perf_CancellationToken*'
```

### System.Threading.Tests.Perf_CancellationToken.CreateLinkedTokenSource1

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [b7575a1ea0c24a2e76330e6fdee08fc89fd1e477](https://github.com/dotnet/runtime/commit/b7575a1ea0c24a2e76330e6fdee08fc89fd1e477)
Compare | [675aea5d3297eadb749d160ee2086586acf79fd9](https://github.com/dotnet/runtime/commit/675aea5d3297eadb749d160ee2086586acf79fd9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b7575a1ea0c24a2e76330e6fdee08fc89fd1e477...675aea5d3297eadb749d160ee2086586acf79fd9)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.CreateAddAndRemove<String>

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

  • [LinkedList - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 16.71 μs | 15.27 μs | 0.91 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CreateAddAndRemove*'
```

### System.Collections.CreateAddAndRemove<String>.LinkedList(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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [b7575a1ea0c24a2e76330e6fdee08fc89fd1e477](https://github.com/dotnet/runtime/commit/b7575a1ea0c24a2e76330e6fdee08fc89fd1e477)
Compare | [675aea5d3297eadb749d160ee2086586acf79fd9](https://github.com/dotnet/runtime/commit/675aea5d3297eadb749d160ee2086586acf79fd9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b7575a1ea0c24a2e76330e6fdee08fc89fd1e477...675aea5d3297eadb749d160ee2086586acf79fd9)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in PerfLabTests.LowLevelPerf

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

  • [GenericClassWithSTringGenericInstanceMethod - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 149.93 μs | 131.31 μs | 0.88 | 0.23 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'PerfLabTests.LowLevelPerf*'
```

### PerfLabTests.LowLevelPerf.GenericClassWithSTringGenericInstanceMethod

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [b7575a1ea0c24a2e76330e6fdee08fc89fd1e477](https://github.com/dotnet/runtime/commit/b7575a1ea0c24a2e76330e6fdee08fc89fd1e477)
Compare | [675aea5d3297eadb749d160ee2086586acf79fd9](https://github.com/dotnet/runtime/commit/675aea5d3297eadb749d160ee2086586acf79fd9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b7575a1ea0c24a2e76330e6fdee08fc89fd1e477...675aea5d3297eadb749d160ee2086586acf79fd9)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in PerfLabTests.CastingPerf2.CastingPerf

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

  • [FooObjIsNull - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 299.88 μs | 262.41 μs | 0.88 | 0.18 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'PerfLabTests.CastingPerf2.CastingPerf*'
```

### PerfLabTests.CastingPerf2.CastingPerf.FooObjIsNull

#### 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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