[Perf] Linux/arm64: 3 Improvements on 5/12/2026 3:13:57 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [983639bd7eb45543ee98e6bc759b728238945d1d](https://github.com/dotnet/runtime/commit/983639bd7eb45543ee98e6bc759b728238945d1d)
Compare | [06c12228774aaa138f92802fe02509e637c66fda](https://github.com/dotnet/runtime/commit/06c12228774aaa138f92802fe02509e637c66fda)
Diff | [Diff](https://github.com/dotnet/runtime/compare/983639bd7eb45543ee98e6bc759b728238945d1d...06c12228774aaa138f92802fe02509e637c66fda)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Guid

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

• [ctor_str - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 27.92 ns | 24.14 ns | 0.86 | 0.01 | False | | |
|

• [Parse - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 27.75 ns | 24.30 ns | 0.88 | 0.02 | False | | |
|

• [ParseExactD - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 27.76 ns | 24.32 ns | 0.88 | 0.03 | 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.Tests.Perf_Guid*'
```

### System.Tests.Perf_Guid.ctor_str

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.Parse

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.ParseExactD

#### 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)