dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 11 Improvements on 3/6/2026 1:06:05 PM +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 | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Compare | [64efb69573d1aa99fa89a96de18ba3247b2bb75e](https://github.com/dotnet/runtime/commit/64efb69573d1aa99fa89a96de18ba3247b2bb75e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b85f10962df5d097ca466ec0ed83664835671e42...64efb69573d1aa99fa89a96de18ba3247b2bb75e)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Memory.ReadOnlySequence

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

  • [Slice_Start - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 40.74 ns | 29.43 ns | 0.72 | 0.10 | False | | |
|
  • [Slice_Start_And_EndPosition - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 78.96 ns | 67.42 ns | 0.85 | 0.14 | False | | |
|
  • [Slice_StartPosition - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 54.72 ns | 44.02 ns | 0.80 | 0.10 | False | | |
|
  • [Slice_Start_And_Length - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 54.36 ns | 42.50 ns | 0.78 | 0.17 | False | | |
|
  • [Slice_StartPosition - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 75.89 ns | 64.06 ns | 0.84 | 0.12 | False | | |

![graph]()
![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.Memory.ReadOnlySequence*'
```

### System.Memory.ReadOnlySequence.Slice_Start(Segment: Multiple)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.ReadOnlySequence.Slice_Start_And_EndPosition(Segment: Multiple)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.ReadOnlySequence.Slice_StartPosition(Segment: Single)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.ReadOnlySequence.Slice_Start_And_Length(Segment: Single)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.ReadOnlySequence.Slice_StartPosition(Segment: Multiple)

#### 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 | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Compare | [64efb69573d1aa99fa89a96de18ba3247b2bb75e](https://github.com/dotnet/runtime/commit/64efb69573d1aa99fa89a96de18ba3247b2bb75e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b85f10962df5d097ca466ec0ed83664835671e42...64efb69573d1aa99fa89a96de18ba3247b2bb75e)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Numerics.Tests.Perf_BigInteger

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

  • [Equals - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 98.60 ns | 87.81 ns | 0.89 | 0.10 | False | | |
|
  • [Equals - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 49.43 ns | 39.65 ns | 0.80 | 0.10 | False | | |
|
  • [Equals - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 62.94 ns | 52.69 ns | 0.84 | 0.14 | False | | |
|
  • [Remainder - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 107.33 ns | 93.18 ns | 0.87 | 0.10 | 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.Numerics.Tests.Perf_BigInteger*'
```

### System.Numerics.Tests.Perf_BigInteger.Equals(arguments: 259 bytes, DiffLastByte)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Equals(arguments: 259 bytes, DiffFirstByte)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Equals(arguments: 67 bytes, Same)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Remainder(arguments: 16,8 bits)

#### 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 | [b85f10962df5d097ca466ec0ed83664835671e42](https://github.com/dotnet/runtime/commit/b85f10962df5d097ca466ec0ed83664835671e42)
Compare | [64efb69573d1aa99fa89a96de18ba3247b2bb75e](https://github.com/dotnet/runtime/commit/64efb69573d1aa99fa89a96de18ba3247b2bb75e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b85f10962df5d097ca466ec0ed83664835671e42...64efb69573d1aa99fa89a96de18ba3247b2bb75e)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Buffers.Tests.SearchValuesCharTests

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

  • [Contains - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 54.07 ns | 44.36 ns | 0.82 | 0.17 | False | | |
|
  • [LastIndexOfAnyExcept - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 261.24 ns | 142.92 ns | 0.55 | 0.09 | 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.SearchValuesCharTests*'
```

### System.Buffers.Tests.SearchValuesCharTests.Contains(Values: "abcdefABCDEF0123456789")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.SearchValuesCharTests.LastIndexOfAnyExcept(Values: "abcdefABCDEF0123456789")

#### 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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