dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 8 Improvements on 1/22/2026 3:05:04 PM -08:00

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

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [726b3dffc2efd466b6cb8526d4a1c96cc0d6a852](https://github.com/dotnet/runtime/commit/726b3dffc2efd466b6cb8526d4a1c96cc0d6a852)
Compare | [e322e12fae5d246a0e778a64857d47a575418afc](https://github.com/dotnet/runtime/commit/e322e12fae5d246a0e778a64857d47a575418afc)
Diff | [Diff](https://github.com/dotnet/runtime/compare/726b3dffc2efd466b6cb8526d4a1c96cc0d6a852...e322e12fae5d246a0e778a64857d47a575418afc)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Perf_Convert

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

  • [FromBase64String - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 476.47 ns | 244.55 ns | 0.51 | 0.09 | False | | |
|
  • [ToBase64String - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.66 μs | 3.43 μs | 0.94 | 0.00 | False | | |
|
  • [FromHexString - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 639.02 ns | 521.43 ns | 0.82 | 0.06 | False | | |
|
  • [ToDateTime_String - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 11.96 μs | 7.74 μs | 0.65 | 0.04 | False | | |
|
  • [FromBase64Chars - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 470.92 ns | 241.14 ns | 0.51 | 0.07 | False | | |

![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.Perf_Convert*'
```

### System.Perf_Convert.FromBase64String

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Perf_Convert.ToBase64String(formattingOptions: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Perf_Convert.FromHexString

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Perf_Convert.ToDateTime_String(value: "Fri, 27 Feb 2009 03:11:21 GMT")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Perf_Convert.FromBase64Chars

#### 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 | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [726b3dffc2efd466b6cb8526d4a1c96cc0d6a852](https://github.com/dotnet/runtime/commit/726b3dffc2efd466b6cb8526d4a1c96cc0d6a852)
Compare | [e322e12fae5d246a0e778a64857d47a575418afc](https://github.com/dotnet/runtime/commit/e322e12fae5d246a0e778a64857d47a575418afc)
Diff | [Diff](https://github.com/dotnet/runtime/compare/726b3dffc2efd466b6cb8526d4a1c96cc0d6a852...e322e12fae5d246a0e778a64857d47a575418afc)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Buffers.Text.Tests.Base64Tests

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

  • [ConvertTryFromBase64Chars - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.66 μs | 3.16 μs | 0.86 | 0.00 | False | | |
|
  • [Base64IsValid - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 526.18 ns | 489.33 ns | 0.93 | 0.03 | False | | |
|
  • [ConvertToBase64CharArray - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.38 μs | 3.13 μs | 0.93 | 0.00 | 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.Base64Tests*'
```

### System.Buffers.Text.Tests.Base64Tests.ConvertTryFromBase64Chars(NumberOfBytes: 1000)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Text.Tests.Base64Tests.Base64IsValid(NumberOfBytes: 1000)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Text.Tests.Base64Tests.ConvertToBase64CharArray(NumberOfBytes: 1000)

#### 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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