dotnet / dotnet/perf-autofiling-issues

[Perf] Windows/x64: 13 Improvements on 4/27/2026 2:35:20 PM +00:00

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arch-x64 branch-refs/heads/main compilationmode-tiered kind-micro os-windows perf-improvement runkind-micro runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [0bda60e7e77cc8727586674deee087cf4b3df766](https://github.com/dotnet/runtime/commit/0bda60e7e77cc8727586674deee087cf4b3df766)
Compare | [6130a50fcc846296d5c722b8e78c3bd292519eaa](https://github.com/dotnet/runtime/commit/6130a50fcc846296d5c722b8e78c3bd292519eaa)
Diff | [Diff](https://github.com/dotnet/runtime/compare/0bda60e7e77cc8727586674deee087cf4b3df766...6130a50fcc846296d5c722b8e78c3bd292519eaa)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.Encodings.Web.Tests.Perf_Encoders

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

  • [EncodeUtf16 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 131.07 ns | 57.43 ns | 0.44 | 0.02 | False | | |
|
  • [EncodeUtf16 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 76.23 ns | 37.90 ns | 0.50 | 0.04 | False | | |
|
  • [EncodeUtf16 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 84.19 ns | 53.17 ns | 0.63 | 0.03 | False | | |
|
  • [EncodeUtf16 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 52.84 ns | 35.70 ns | 0.68 | 0.08 | False | | |
|
  • [EncodeUtf16 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 41.47 ns | 29.09 ns | 0.70 | 0.02 | False | | |
|
  • [EncodeUtf8 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 47.91 ns | 34.90 ns | 0.73 | 0.04 | False | | |
|
  • [EncodeUtf8 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 62.63 ns | 48.91 ns | 0.78 | 0.01 | False | | |

![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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Encodings.Web.Tests.Perf_Encoders*'
```

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: Url,&lorem ipsum=dolor sit amet,512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: JavaScript,&Hello+<World>!,16)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: JavaScript,&Hello+<World>!,512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: UnsafeRelaxed,hello "there",512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: Url,�2020,16)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf8(arguments: Url,�2020,16)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf8(arguments: Url,�2020,512)

#### 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 | Windows 10.0.22631
Queue | ViperWindows
Baseline | [0bda60e7e77cc8727586674deee087cf4b3df766](https://github.com/dotnet/runtime/commit/0bda60e7e77cc8727586674deee087cf4b3df766)
Compare | [6130a50fcc846296d5c722b8e78c3bd292519eaa](https://github.com/dotnet/runtime/commit/6130a50fcc846296d5c722b8e78c3bd292519eaa)
Diff | [Diff](https://github.com/dotnet/runtime/compare/0bda60e7e77cc8727586674deee087cf4b3df766...6130a50fcc846296d5c722b8e78c3bd292519eaa)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Version

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

  • [Parse2 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 30.00 ns | 26.82 ns | 0.89 | 0.01 | False | | |
|
  • [Parse3 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 40.11 ns | 36.54 ns | 0.91 | 0.00 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_Version*'
```

### System.Tests.Perf_Version.Parse2

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Version.Parse3

#### 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 | Windows 10.0.22631
Queue | ViperWindows
Baseline | [0bda60e7e77cc8727586674deee087cf4b3df766](https://github.com/dotnet/runtime/commit/0bda60e7e77cc8727586674deee087cf4b3df766)
Compare | [6130a50fcc846296d5c722b8e78c3bd292519eaa](https://github.com/dotnet/runtime/commit/6130a50fcc846296d5c722b8e78c3bd292519eaa)
Diff | [Diff](https://github.com/dotnet/runtime/compare/0bda60e7e77cc8727586674deee087cf4b3df766...6130a50fcc846296d5c722b8e78c3bd292519eaa)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in ArrayDeAbstraction

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

  • [sum_static_array_via_local - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 32.07 ns | 29.66 ns | 0.92 | 0.07 | 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 'ArrayDeAbstraction*'
```

### ArrayDeAbstraction.sum_static_array_via_local

#### 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 | Windows 10.0.22631
Queue | ViperWindows
Baseline | [0bda60e7e77cc8727586674deee087cf4b3df766](https://github.com/dotnet/runtime/commit/0bda60e7e77cc8727586674deee087cf4b3df766)
Compare | [6130a50fcc846296d5c722b8e78c3bd292519eaa](https://github.com/dotnet/runtime/commit/6130a50fcc846296d5c722b8e78c3bd292519eaa)
Diff | [Diff](https://github.com/dotnet/runtime/compare/0bda60e7e77cc8727586674deee087cf4b3df766...6130a50fcc846296d5c722b8e78c3bd292519eaa)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Enum

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

  • [GetNames_Generic - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 18.77 ns | 12.63 ns | 0.67 | 0.10 | 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.Tests.Perf_Enum*'
```

### System.Tests.Perf_Enum.GetNames_Generic

#### 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 | Windows 10.0.22631
Queue | ViperWindows
Baseline | [0bda60e7e77cc8727586674deee087cf4b3df766](https://github.com/dotnet/runtime/commit/0bda60e7e77cc8727586674deee087cf4b3df766)
Compare | [6130a50fcc846296d5c722b8e78c3bd292519eaa](https://github.com/dotnet/runtime/commit/6130a50fcc846296d5c722b8e78c3bd292519eaa)
Diff | [Diff](https://github.com/dotnet/runtime/compare/0bda60e7e77cc8727586674deee087cf4b3df766...6130a50fcc846296d5c722b8e78c3bd292519eaa)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.Json.Tests.Utf8JsonReaderCommentsTests

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

  • [Utf8JsonReaderCommentParsing - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 83.34 ns | 75.80 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Json.Tests.Utf8JsonReaderCommentsTests*'
```

### System.Text.Json.Tests.Utf8JsonReaderCommentsTests.Utf8JsonReaderCommentParsing(CommentHandling: Skip, SegmentSize: 100, TestCase: ShortSingleLine)

#### 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 | Windows 10.0.22631
Queue | ViperWindows
Baseline | [0bda60e7e77cc8727586674deee087cf4b3df766](https://github.com/dotnet/runtime/commit/0bda60e7e77cc8727586674deee087cf4b3df766)
Compare | [6130a50fcc846296d5c722b8e78c3bd292519eaa](https://github.com/dotnet/runtime/commit/6130a50fcc846296d5c722b8e78c3bd292519eaa)
Diff | [Diff](https://github.com/dotnet/runtime/compare/0bda60e7e77cc8727586674deee087cf4b3df766...6130a50fcc846296d5c722b8e78c3bd292519eaa)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Reflection.Metadata.Perf_TypeName

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

  • [TryParse_Invalid - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 29.46 ns | 25.46 ns | 0.86 | 0.10 | 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.Reflection.Metadata.Perf_TypeName*'
```

### System.Reflection.Metadata.Perf_TypeName.TryParse_Invalid(input: "Wrong.Syntax[[]]")

#### 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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