[Perf] Linux/x64: 32 Improvements on 8/3/2026 7:26:34 AM +00:00

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#77,497 opened on Aug 6, 2026 2 comments 0 reactions 0 assignees View on GitHub

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

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Forks: 8
PR merge metrics: PR metrics pending

Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [79efd2de59f086171fd811d7375241616c43b890](https://github.com/dotnet/runtime/commit/79efd2de59f086171fd811d7375241616c43b890)
Compare | [c4fc2a5afc5644e10973054b1aa63c27a1584404](https://github.com/dotnet/runtime/commit/c4fc2a5afc5644e10973054b1aa63c27a1584404)
Diff | [Diff](https://github.com/dotnet/runtime/compare/79efd2de59f086171fd811d7375241616c43b890...c4fc2a5afc5644e10973054b1aa63c27a1584404)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.MathBenchmarks.Single

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

[Log10P1 - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 143.50 μs | 64.88 μs | 0.45 | 0.25 | False | | |
|

[Asinh - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 109.31 μs | 65.12 μs | 0.60 | 0.07 | False | | |
|

[Acos - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 59.35 μs | 37.35 μs | 0.63 | 0.30 | False | | |
|

[Cbrt - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 62.12 μs | 39.62 μs | 0.64 | 0.10 | False | | |
|

[Acosh - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 78.84 μs | 53.35 μs | 0.68 | 0.03 | False | | |
|

[Log10 - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 76.29 μs | 52.15 μs | 0.68 | 0.19 | False | | |
|

[AtanPi - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 74.87 μs | 52.03 μs | 0.69 | 0.35 | False | | |
|

[AsinPi - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 59.72 μs | 47.37 μs | 0.79 | 0.06 | False | | |

![graph]()
![graph]()
![graph]()
![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.MathBenchmarks.Single*'
```

### System.MathBenchmarks.Single.Log10P1

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Asinh

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Acos

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Cbrt

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Acosh

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Log10

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.AtanPi

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.AsinPi

#### 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

### Improvements in System.MathBenchmarks.Double

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

[Log - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 91.48 μs | 53.72 μs | 0.59 | 0.34 | False | | |
|

[LogP1 - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 109.07 μs | 72.41 μs | 0.66 | 0.06 | False | | |
|

[Acosh - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 99.86 μs | 69.61 μs | 0.70 | 0.39 | False | | |
|

[Asin - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 88.71 μs | 69.52 μs | 0.78 | 0.25 | False | | |
|

[Tan - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 84.89 μs | 72.01 μs | 0.85 | 0.17 | False | | |
|

[AsinPi - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 69.81 μs | 65.64 μs | 0.94 | 0.07 | False | | |

![graph]()
![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.MathBenchmarks.Double*'
```

### System.MathBenchmarks.Double.Log

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.LogP1

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Acosh

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Asin

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Tan

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.AsinPi

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Buffers.Text.Tests.Utf8ParserTests

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

[TryParseUInt32Hex - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 83.41 ns | 73.08 ns | 0.88 | 0.22 | False | | |
|

[TryParseUInt64Hex - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 51.55 ns | 45.45 ns | 0.88 | 0.23 | False | | |
|

[TryParseUInt32Hex - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 67.40 ns | 61.40 ns | 0.91 | 0.23 | False | | |

![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.Buffers.Text.Tests.Utf8ParserTests*'
```

### System.Buffers.Text.Tests.Utf8ParserTests.TryParseUInt32Hex(value: FFFFFFFFFFFFFFFF)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Text.Tests.Utf8ParserTests.TryParseUInt64Hex(value: 0)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Text.Tests.Utf8ParserTests.TryParseUInt32Hex(value: 3039)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Memory.Span<Byte>

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

[LastIndexOfValue - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 67.32 ns | 61.00 ns | 0.91 | 0.21 | False | | |
|

[IndexOfAnyTwoValues - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 50.07 ns | 46.09 ns | 0.92 | 0.18 | False | | |
|

[IndexOfAnyTwoValues - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 98.05 ns | 92.45 ns | 0.94 | 0.13 | False | | |

![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.Span*'
```

### System.Memory.Span<Byte>.LastIndexOfValue(Size: 33)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span<Byte>.IndexOfAnyTwoValues(Size: 33)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span<Byte>.IndexOfAnyTwoValues(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Numerics.Tests.Perf_Matrix3x2

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

[CreateScaleFromScalarXYWithCenterBenchmark - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 47.96 ns | 44.47 ns | 0.93 | 0.16 | False | | |
|

[CreateScaleFromVectorWithCenterBenchmark - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 55.92 ns | 52.52 ns | 0.94 | 0.14 | 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.Numerics.Tests.Perf_Matrix3x2*'
```

### System.Numerics.Tests.Perf_Matrix3x2.CreateScaleFromScalarXYWithCenterBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_Matrix3x2.CreateScaleFromVectorWithCenterBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Tests.Perf_String

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

[TrimEnd - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 52.21 ns | 43.43 ns | 0.83 | 0.24 | False | | |
|

[IndexOfAny - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 86.52 ns | 80.24 ns | 0.93 | 0.17 | 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.Tests.Perf_String*'
```

### System.Tests.Perf_String.TrimEnd(s: "Test")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_String.IndexOfAny

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Numerics.Tests.Perf_Matrix4x4

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

[SubtractOperatorBenchmark - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 39.64 ns | 36.89 ns | 0.93 | 0.17 | False | | |
|

[CreateScaleFromVectorBenchmark - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 31.84 ns | 29.86 ns | 0.94 | 0.13 | 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.Numerics.Tests.Perf_Matrix4x4*'
```

### System.Numerics.Tests.Perf_Matrix4x4.SubtractOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_Matrix4x4.CreateScaleFromVectorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Numerics.Tests.Perf_VectorOf<UInt64>

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

[DivideBenchmark - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 24.27 ns | 21.39 ns | 0.88 | 0.24 | 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.Tests.Perf_VectorOf*'
```

### System.Numerics.Tests.Perf_VectorOf<UInt64>.DivideBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Numerics.Tests.Perf_VectorOf<Int64>

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

[DivisionOperatorBenchmark - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 24.19 ns | 21.93 ns | 0.91 | 0.20 | 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.Tests.Perf_VectorOf*'
```

### System.Numerics.Tests.Perf_VectorOf<Int64>.DivisionOperatorBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Numerics.Tests.Perf_VectorOf<Int32>

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

[DivideBenchmark - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 32.15 ns | 29.13 ns | 0.91 | 0.20 | 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.Tests.Perf_VectorOf*'
```

### System.Numerics.Tests.Perf_VectorOf<Int32>.DivideBenchmark

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with the linked benchmark sources in performance/src/benchmarks/micro/runtime/Math/Functions/Single/, especially Log10P1.cs, Asinh.cs, Acos.cs, Cbrt.cs, Acosh.cs, Log10.cs, AtanPi.cs, and AsinPi.cs, and review the WASM microbenchmark report. The report identifies performance improvements but does not specify a code change or acceptance test, so completion would require triaging and explaining the measurements before defining a fix.

Written by the indexing model from the issue text.

Assessment

Tech stack: wasm
Domain: performance
Issue type: Bug
Difficulty: 4/5
Estimated time: 3-5 days
Activity status: Quiet
Clarity: Needs clarification
Newbie friendliness: 25/100

[Perf] Linux/x64: 32 Improvements on 8/3/2026 7:26:34 AM +00:00

Description

Contributor guide

Research direction

Assessment

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