dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 5 Improvements on 3/3/2026 8:24:47 AM +00:00

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

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [371f3c356098295803263c75b74e5ee1d10cae01](https://github.com/dotnet/runtime/commit/371f3c356098295803263c75b74e5ee1d10cae01)
Compare | [4d392de153f966681b12d08283a2b381f814dc1b](https://github.com/dotnet/runtime/commit/4d392de153f966681b12d08283a2b381f814dc1b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/371f3c356098295803263c75b74e5ee1d10cae01...4d392de153f966681b12d08283a2b381f814dc1b)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Buffers.Tests.ReadOnlySequenceTests<Byte>

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

  • [FirstSingleSegment - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 25.66 ns | 21.43 ns | 0.84 | 0.21 | 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.Buffers.Tests.ReadOnlySequenceTests*'
```

### System.Buffers.Tests.ReadOnlySequenceTests<Byte>.FirstSingleSegment

#### 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 | [371f3c356098295803263c75b74e5ee1d10cae01](https://github.com/dotnet/runtime/commit/371f3c356098295803263c75b74e5ee1d10cae01)
Compare | [003403337b652148b9a62ae5a6a13df4bb1d264f](https://github.com/dotnet/runtime/commit/003403337b652148b9a62ae5a6a13df4bb1d264f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/371f3c356098295803263c75b74e5ee1d10cae01...003403337b652148b9a62ae5a6a13df4bb1d264f)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Text.Tests.Perf_Encoding

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

  • [GetByteCount - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 273.05 ns | 176.36 ns | 0.65 | 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.Text.Tests.Perf_Encoding*'
```

### System.Text.Tests.Perf_Encoding.GetByteCount(size: 16, encName: "utf-8")

#### 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 | [371f3c356098295803263c75b74e5ee1d10cae01](https://github.com/dotnet/runtime/commit/371f3c356098295803263c75b74e5ee1d10cae01)
Compare | [4d392de153f966681b12d08283a2b381f814dc1b](https://github.com/dotnet/runtime/commit/4d392de153f966681b12d08283a2b381f814dc1b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/371f3c356098295803263c75b74e5ee1d10cae01...4d392de153f966681b12d08283a2b381f814dc1b)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Text.Perf_Ascii

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

  • [EqualsIgnoreCase_ExactlyTheSame_Bytes - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 137.15 ns | 94.39 ns | 0.69 | 0.13 | 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.Text.Perf_Ascii*'
```

### System.Text.Perf_Ascii.EqualsIgnoreCase_ExactlyTheSame_Bytes(Size: 128)

#### 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 | [371f3c356098295803263c75b74e5ee1d10cae01](https://github.com/dotnet/runtime/commit/371f3c356098295803263c75b74e5ee1d10cae01)
Compare | [4d392de153f966681b12d08283a2b381f814dc1b](https://github.com/dotnet/runtime/commit/4d392de153f966681b12d08283a2b381f814dc1b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/371f3c356098295803263c75b74e5ee1d10cae01...4d392de153f966681b12d08283a2b381f814dc1b)
Configs | CompilationMode:wasm, RunKind:micro

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

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

  • [Queue - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 153.69 ns | 113.71 ns | 0.74 | 0.16 | 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.CtorGivenSize*'
```

### System.Collections.CtorGivenSize<String>.Queue(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 | [371f3c356098295803263c75b74e5ee1d10cae01](https://github.com/dotnet/runtime/commit/371f3c356098295803263c75b74e5ee1d10cae01)
Compare | [003403337b652148b9a62ae5a6a13df4bb1d264f](https://github.com/dotnet/runtime/commit/003403337b652148b9a62ae5a6a13df4bb1d264f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/371f3c356098295803263c75b74e5ee1d10cae01...003403337b652148b9a62ae5a6a13df4bb1d264f)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Double>

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

  • [Sin - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 29.72 μs | 27.43 μs | 0.92 | 0.02 | 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.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives*'
```

### System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Double>.Sin(BufferLength: 128)

#### 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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