dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/arm64: 28 Improvements on 6/25/2026 8:16:25 PM +00:00

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Description

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8](https://github.com/dotnet/runtime/commit/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8)
Compare | [c369fd627a26b606f36e6b3cbef6f25f3c00bbac](https://github.com/dotnet/runtime/commit/c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8...c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in System.Reflection.Attributes

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

  • [IsDefinedClassHit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 851.93 ns | 681.92 ns | 0.80 | 0.20 | False | | |
|
  • [IsDefinedMethodBaseHit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 889.35 ns | 726.18 ns | 0.82 | 0.16 | False | | |
|
  • [IsDefinedClassHitInherit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 846.38 ns | 692.24 ns | 0.82 | 0.15 | False | | |
|
  • [IsDefinedMethodBaseHitInherit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 889.09 ns | 750.64 ns | 0.84 | 0.18 | False | | |
|
  • [IsDefinedMethodOverrideMiss - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 883.57 ns | 747.27 ns | 0.85 | 0.19 | False | | |
|
  • [IsDefinedMethodOverrideHitInherit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 869.89 ns | 741.56 ns | 0.85 | 0.16 | False | | |
|
  • [IsDefinedMethodOverrideHit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 880.17 ns | 755.23 ns | 0.86 | 0.21 | False | | |
|
  • [IsDefinedMethodOverrideMissInherit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 868.87 ns | 746.72 ns | 0.86 | 0.17 | False | | |
|
  • [GetCustomAttributesClassHit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.98 μs | 1.73 μs | 0.88 | 0.06 | False | | |
|
  • [GetCustomAttributesMethodOverrideHitInherit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.05 μs | 2.71 μs | 0.89 | 0.13 | False | | |
|
  • [GetCustomAttributesClassHitInherit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.15 μs | 1.92 μs | 0.89 | 0.11 | False | | |
|
  • [GetCustomAttributesMethodBaseHitInherit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.01 μs | 1.82 μs | 0.91 | 0.13 | False | | |
|
  • [GetCustomAttributesMethodOverrideMissInherit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.99 μs | 1.82 μs | 0.91 | 0.12 | False | | |
|
  • [GetCustomAttributesMethodOverrideHit - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.93 μs | 1.79 μs | 0.93 | 0.14 | False | | |
|
  • [GetCustomAttributesMethodOverrideMiss - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.93 μs | 1.81 μs | 0.93 | 0.12 | False | | |

![graph]()
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![graph]()
![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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Reflection.Attributes*'
```

### System.Reflection.Attributes.IsDefinedClassHit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodBaseHit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedClassHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodBaseHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodOverrideMiss

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodOverrideHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodOverrideHit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodOverrideMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesClassHit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodOverrideHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesClassHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodBaseHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodOverrideMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodOverrideHit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodOverrideMiss

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8](https://github.com/dotnet/runtime/commit/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8)
Compare | [c369fd627a26b606f36e6b3cbef6f25f3c00bbac](https://github.com/dotnet/runtime/commit/c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8...c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

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

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

  • [ContainsAny - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 126.84 ns | 34.32 ns | 0.27 | 0.11 | False | | |
|
  • [ContainsAny - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 152.05 ns | 54.41 ns | 0.36 | 0.13 | False | | |
|
  • [LastIndexOfAnyExcept - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 176.81 ns | 150.62 ns | 0.85 | 0.07 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Buffers.Tests.SearchValuesCharTests*'
```

### System.Buffers.Tests.SearchValuesCharTests.ContainsAny(Values: "abcdefABCDEF0123456789Ü")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Tests.SearchValuesCharTests.ContainsAny(Values: "ßäöüÄÖÜ")

#### ETL Files

#### Histogram

#### JIT Disasms

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

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8](https://github.com/dotnet/runtime/commit/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8)
Compare | [c369fd627a26b606f36e6b3cbef6f25f3c00bbac](https://github.com/dotnet/runtime/commit/c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8...c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in System.Threading.Channels.Tests.SpscUnboundedChannelPerfTests

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

  • [ReadAsyncThenWriteAsync - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 433.73 ns | 204.83 ns | 0.47 | 0.17 | False | | |
|
  • [PingPong - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 61.67 ms | 41.66 ms | 0.68 | 0.55 | 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.Threading.Channels.Tests.SpscUnboundedChannelPerfTests*'
```

### System.Threading.Channels.Tests.SpscUnboundedChannelPerfTests.ReadAsyncThenWriteAsync

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Threading.Channels.Tests.SpscUnboundedChannelPerfTests.PingPong

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8](https://github.com/dotnet/runtime/commit/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8)
Compare | [c369fd627a26b606f36e6b3cbef6f25f3c00bbac](https://github.com/dotnet/runtime/commit/c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8...c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in MicroBenchmarks.Serializers.Json_FromString<CollectionsOfPrimitives>

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

  • [SystemTextJson_Reflection_ - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1068.05 μs | 469.45 μs | 0.44 | 0.12 | False | | |
|
  • [SystemTextJson_SourceGen_ - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 1070.71 μs | 471.28 μs | 0.44 | 0.12 | 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 'MicroBenchmarks.Serializers.Json_FromString*'
```

### MicroBenchmarks.Serializers.Json_FromString<CollectionsOfPrimitives>.SystemTextJson_Reflection_

#### ETL Files

#### Histogram

#### JIT Disasms

### MicroBenchmarks.Serializers.Json_FromString<CollectionsOfPrimitives>.SystemTextJson_SourceGen_

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8](https://github.com/dotnet/runtime/commit/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8)
Compare | [c369fd627a26b606f36e6b3cbef6f25f3c00bbac](https://github.com/dotnet/runtime/commit/c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8...c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in System.Threading.Channels.Tests.BoundedChannelPerfTests

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

  • [ReadAsyncThenWriteAsync - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 423.14 ns | 219.15 ns | 0.52 | 0.15 | False | | |
|
  • [PingPong - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 63.29 ms | 46.18 ms | 0.73 | 0.56 | 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.Threading.Channels.Tests.BoundedChannelPerfTests*'
```

### System.Threading.Channels.Tests.BoundedChannelPerfTests.ReadAsyncThenWriteAsync

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Threading.Channels.Tests.BoundedChannelPerfTests.PingPong

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8](https://github.com/dotnet/runtime/commit/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8)
Compare | [c369fd627a26b606f36e6b3cbef6f25f3c00bbac](https://github.com/dotnet/runtime/commit/c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8...c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in MicroBenchmarks.Serializers.Json_FromStream<CollectionsOfPrimitives>

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

  • [SystemTextJson_SourceGen_ - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 1377.17 μs | 509.70 μs | 0.37 | 0.09 | False | | |
|
  • [SystemTextJson_Reflection_ - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 1412.69 μs | 534.41 μs | 0.38 | 0.07 | 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 'MicroBenchmarks.Serializers.Json_FromStream*'
```

### MicroBenchmarks.Serializers.Json_FromStream<CollectionsOfPrimitives>.SystemTextJson_SourceGen_

#### ETL Files

#### Histogram

#### JIT Disasms

### MicroBenchmarks.Serializers.Json_FromStream<CollectionsOfPrimitives>.SystemTextJson_Reflection_

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8](https://github.com/dotnet/runtime/commit/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8)
Compare | [c369fd627a26b606f36e6b3cbef6f25f3c00bbac](https://github.com/dotnet/runtime/commit/c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8...c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in CscBench

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

  • [DatflowTest - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.71 secs | 1.50 secs | 0.88 | 0.38 | 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 'CscBench*'
```

### CscBench.DatflowTest

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8](https://github.com/dotnet/runtime/commit/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8)
Compare | [c369fd627a26b606f36e6b3cbef6f25f3c00bbac](https://github.com/dotnet/runtime/commit/c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/42f3669b3a7f418f571ad63a77b3e7ebf9ee64a8...c369fd627a26b606f36e6b3cbef6f25f3c00bbac)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Improvements in System.Threading.Channels.Tests.UnboundedChannelPerfTests

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

  • [ReadAsyncThenWriteAsync - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 440.57 ns | 233.05 ns | 0.53 | 0.18 | 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.Threading.Channels.Tests.UnboundedChannelPerfTests*'
```

### System.Threading.Channels.Tests.UnboundedChannelPerfTests.ReadAsyncThenWriteAsync

#### 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)

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with the benchmark source at src/benchmarks/micro/runtime/System.Reflection/Attributes.cs, especially the listed lines for the affected benchmarks. Compare the linked baseline and test reports for the Linux/arm64 configuration, then identify whether the improvement points to an actionable runtime issue. Done requires a confirmed scope and validated performance result.

Written by the indexing model from the issue text.

Assessment

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

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