dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/arm64: 49 Improvements on 8/5/2026 1:23:13 AM +00:00

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ampere arch-arm64 bdn-update branch-refs/heads/main compilationmode-tiered kind-micro os-linux perf-improvement runkind-micro runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [2dd5330804f9d4f49599d82c90a67892d4dd8af0](https://github.com/dotnet/runtime/commit/2dd5330804f9d4f49599d82c90a67892d4dd8af0)
Compare | [c8f97975ab0d8ff84aebf176829e17f7c7052f03](https://github.com/dotnet/runtime/commit/c8f97975ab0d8ff84aebf176829e17f7c7052f03)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2dd5330804f9d4f49599d82c90a67892d4dd8af0...c8f97975ab0d8ff84aebf176829e17f7c7052f03)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1158.21 ns | 899.78 ns | 0.78 | 0.10 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 7.45 μs | 5.82 μs | 0.78 | 0.10 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1073.18 ns | 842.59 ns | 0.79 | 0.09 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1126.35 ns | 886.51 ns | 0.79 | 0.11 | False | | |
|
  • [ParseAndGetFullName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 7.53 μs | 6.05 μs | 0.80 | 0.07 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.35 μs | 1.09 μs | 0.81 | 0.08 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1166.03 ns | 944.60 ns | 0.81 | 0.11 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.41 μs | 2.78 μs | 0.82 | 0.12 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1153.44 ns | 941.24 ns | 0.82 | 0.07 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 4.05 μs | 3.31 μs | 0.82 | 0.09 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.32 μs | 1.08 μs | 0.82 | 0.08 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.34 μs | 1.10 μs | 0.82 | 0.08 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1123.56 ns | 926.50 ns | 0.82 | 0.12 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.31 μs | 1.08 μs | 0.83 | 0.07 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.24 μs | 1.03 μs | 0.83 | 0.15 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 8.90 μs | 7.38 μs | 0.83 | 0.06 | False | | |
|
  • [Parse_FullNames - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.58 μs | 2.15 μs | 0.83 | 0.15 | False | | |
|
  • [ParseAndGetFullName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.05 μs | 2.55 μs | 0.84 | 0.06 | False | | |
|
  • [ParseAndGetFullName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.93 μs | 2.46 μs | 0.84 | 0.05 | False | | |
|
  • [Parse_FullNames - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 6.26 μs | 5.26 μs | 0.84 | 0.14 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.27 μs | 1.07 μs | 0.85 | 0.09 | False | | |
|
  • [ParseAndGetFullName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.94 μs | 2.49 μs | 0.85 | 0.09 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.33 μs | 1.13 μs | 0.85 | 0.09 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 4.07 μs | 3.49 μs | 0.86 | 0.07 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1019.28 ns | 872.65 ns | 0.86 | 0.12 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.34 μs | 2.86 μs | 0.86 | 0.14 | False | | |
|
  • [Parse_FullNames - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.47 μs | 2.13 μs | 0.86 | 0.12 | False | | |
|
  • [Parse_AssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.40 μs | 2.94 μs | 0.86 | 0.12 | False | | |
|
  • [Parse_FullNames - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.41 μs | 2.09 μs | 0.86 | 0.11 | False | | |
|
  • [ParseAndGetAssemblyQualifiedName - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 4.07 μs | 3.55 μs | 0.87 | 0.11 | False | | |

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[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.Reflection.Metadata.Perf_TypeName*'
```

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Int32[]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Collections.Generic.Dictionary`2[]) (COMPLEX))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(int))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Int32&))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetFullName(input: typeof(System.Collections.Generic.Dictionary`2[]) (COMPLEX))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Int32[,]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Int32[*]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Reflection.Metadata.NestedGeneric<String, Boolean>))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Int32[,]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Reflection.Metadata.NestedGeneric<String, Boolean>))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Int32*))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Int32[*]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Int32*))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Int32&))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Reflection.Metadata.Nested))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Collections.Generic.Dictionary`2[]) (COMPLEX))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_FullNames(input: typeof(System.Reflection.Metadata.NestedGeneric<String, Boolean>))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetFullName(input: typeof(System.Reflection.Metadata.NestedGeneric<String, Boolean>))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetFullName(input: typeof(System.Collections.Generic.Dictionary<String, Boolean>))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_FullNames(input: typeof(System.Collections.Generic.Dictionary`2[]) (COMPLEX))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(int))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetFullName(input: typeof(System.Collections.Generic.Dictionary`2[]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Int32[]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Collections.Generic.Dictionary<String, Boolean>))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Reflection.Metadata.Nested))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Collections.Generic.Dictionary<String, Boolean>))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_FullNames(input: typeof(System.Collections.Generic.Dictionary`2[]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_AssemblyQualifiedName(input: typeof(System.Collections.Generic.Dictionary`2[]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.Parse_FullNames(input: typeof(System.Collections.Generic.Dictionary<String, Boolean>))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Metadata.Perf_TypeName.ParseAndGetAssemblyQualifiedName(input: typeof(System.Collections.Generic.Dictionary`2[]))

#### 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 | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [2dd5330804f9d4f49599d82c90a67892d4dd8af0](https://github.com/dotnet/runtime/commit/2dd5330804f9d4f49599d82c90a67892d4dd8af0)
Compare | [c8f97975ab0d8ff84aebf176829e17f7c7052f03](https://github.com/dotnet/runtime/commit/c8f97975ab0d8ff84aebf176829e17f7c7052f03)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2dd5330804f9d4f49599d82c90a67892d4dd8af0...c8f97975ab0d8ff84aebf176829e17f7c7052f03)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.Concurrent.IsEmpty<String>

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

  • [Queue - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 11.55 ns | 4.38 ns | 0.38 | 0.13 | False | | |
|
  • [Queue - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 12.62 ns | 5.96 ns | 0.47 | 0.02 | False | | |
|
  • [Dictionary - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.09 μs | 1.50 μs | 0.72 | 0.37 | 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.Collections.Concurrent.IsEmpty*'
```

### System.Collections.Concurrent.IsEmpty<String>.Queue(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Concurrent.IsEmpty<String>.Queue(Size: 0)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Concurrent.IsEmpty<String>.Dictionary(Size: 0)

#### 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 Run Information and the linked benchmark source at src/benchmarks/micro/libraries/System.Reflection.Metadata/Perf.TypeName.cs#L48-L60. Compare the baseline and test results in the linked performance reports and determine whether the reported arm64 improvement requires any repository change; completion would require a documented triage decision.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
performance
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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