dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 5 Improvements on 1/24/2026 4:18:23 AM +00:00

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

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | TigerUbuntu
Baseline | [2cd0cc89e2bdbcaa804c93a36adefa055d851c40](https://github.com/dotnet/runtime/commit/2cd0cc89e2bdbcaa804c93a36adefa055d851c40)
Compare | [8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b](https://github.com/dotnet/runtime/commit/8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2cd0cc89e2bdbcaa804c93a36adefa055d851c40...8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b)
Configs | CompilationMode:tiered, RunKind:micro

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

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

  • [ImmutableList - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 9.39 μs | 8.46 μs | 0.90 | 0.08 | 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.CtorFromCollection*'
```

### System.Collections.CtorFromCollection<String>.ImmutableList(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 | TigerUbuntu
Baseline | [2cd0cc89e2bdbcaa804c93a36adefa055d851c40](https://github.com/dotnet/runtime/commit/2cd0cc89e2bdbcaa804c93a36adefa055d851c40)
Compare | [8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b](https://github.com/dotnet/runtime/commit/8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2cd0cc89e2bdbcaa804c93a36adefa055d851c40...8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Xml.Linq.Perf_XElement

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

  • [GetValue - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 40.36 ns | 37.24 ns | 0.92 | 0.25 | 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.Xml.Linq.Perf_XElement*'
```

### System.Xml.Linq.Perf_XElement.GetValue

#### 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 | TigerUbuntu
Baseline | [2cd0cc89e2bdbcaa804c93a36adefa055d851c40](https://github.com/dotnet/runtime/commit/2cd0cc89e2bdbcaa804c93a36adefa055d851c40)
Compare | [8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b](https://github.com/dotnet/runtime/commit/8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2cd0cc89e2bdbcaa804c93a36adefa055d851c40...8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b)
Configs | CompilationMode:tiered, RunKind:micro

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

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

  • [IterateGetPositionMemory - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 25.51 ns | 22.00 ns | 0.86 | 0.32 | False | | |
|
  • [IterateGetPositionSingleSegment - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 22.61 ns | 18.35 ns | 0.81 | 0.08 | 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.Buffers.Tests.ReadOnlySequenceTests*'
```

### System.Buffers.Tests.ReadOnlySequenceTests<Char>.IterateGetPositionMemory

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.ReadOnlySequenceTests<Char>.IterateGetPositionSingleSegment

#### 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 | TigerUbuntu
Baseline | [2cd0cc89e2bdbcaa804c93a36adefa055d851c40](https://github.com/dotnet/runtime/commit/2cd0cc89e2bdbcaa804c93a36adefa055d851c40)
Compare | [8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b](https://github.com/dotnet/runtime/commit/8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2cd0cc89e2bdbcaa804c93a36adefa055d851c40...8fafcb3251a3d2ccde36612a2eab47e9ae8ebe2b)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Xml.Linq.Perf_XDocument

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

  • [Create - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 5.65 ns | 4.13 ns | 0.73 | 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.Xml.Linq.Perf_XDocument*'
```

### System.Xml.Linq.Perf_XDocument.Create

#### 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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