dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/arm64: 8 Improvements on 1/26/2026 1:20:18 PM +00:00

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ampere arch-arm64 branch-refs/heads/main kind-micro os-linux perf-improvement runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [32cae3846c5e91040c870577ecdc0448a6fd7669](https://github.com/dotnet/runtime/commit/32cae3846c5e91040c870577ecdc0448a6fd7669)
Compare | [1b15c7c207e0bbfd46a6289f95368927f3dba30b](https://github.com/dotnet/runtime/commit/1b15c7c207e0bbfd46a6289f95368927f3dba30b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/32cae3846c5e91040c870577ecdc0448a6fd7669...1b15c7c207e0bbfd46a6289f95368927f3dba30b)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Double

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

  • [ToStringWithFormat - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 202.54 ns | 186.88 ns | 0.92 | 0.01 | False | | |
|
  • [ToStringWithCultureInfo - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 201.45 ns | 180.87 ns | 0.90 | 0.01 | False | | |
|
  • [ToStringWithFormat - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 204.87 ns | 184.50 ns | 0.90 | 0.00 | False | | |
|
  • [ToString - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 195.92 ns | 185.57 ns | 0.95 | 0.01 | False | | |
|
  • [ToStringWithFormat - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 200.83 ns | 185.65 ns | 0.92 | 0.00 | False | | |
|
  • [ToStringWithFormat - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 199.74 ns | 181.67 ns | 0.91 | 0.00 | False | | |
|
  • [ToStringWithCultureInfo - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 201.61 ns | 181.85 ns | 0.90 | 0.00 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_Double*'
```

### System.Tests.Perf_Double.ToStringWithFormat(value: -1.7976931348623157E+308, format: "G")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Double.ToStringWithCultureInfo(value: 1.7976931348623157E+308, culture: zh)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Double.ToStringWithFormat(value: -1.7976931348623157E+308, format: "R")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Double.ToString(value: 1.7976931348623157E+308)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Double.ToStringWithFormat(value: 1.7976931348623157E+308, format: "R")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Double.ToStringWithFormat(value: 1.7976931348623157E+308, format: "G")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Double.ToStringWithCultureInfo(value: -1.7976931348623157E+308, culture: zh)

#### 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 | [32cae3846c5e91040c870577ecdc0448a6fd7669](https://github.com/dotnet/runtime/commit/32cae3846c5e91040c870577ecdc0448a6fd7669)
Compare | [1b15c7c207e0bbfd46a6289f95368927f3dba30b](https://github.com/dotnet/runtime/commit/1b15c7c207e0bbfd46a6289f95368927f3dba30b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/32cae3846c5e91040c870577ecdc0448a6fd7669...1b15c7c207e0bbfd46a6289f95368927f3dba30b)
Configs | CompilationMode:tiered, RunKind:micro

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

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

  • [WriteDoubles - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 20.80 ms | 19.52 ms | 0.94 | 0.00 | 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.Text.Json.Tests.Perf_Doubles*'
```

### System.Text.Json.Tests.Perf_Doubles.WriteDoubles(Formatted: True, SkipValidation: True)

#### 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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