[Perf] Linux/arm64: 3 Improvements on 1/28/2026 4:50:06 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [5097397670bb0d461d939644f66256258c0f1186](https://github.com/dotnet/runtime/commit/5097397670bb0d461d939644f66256258c0f1186)
Compare | [5c2326596dc0b21583dbba5db9298c025eacbf64](https://github.com/dotnet/runtime/commit/5c2326596dc0b21583dbba5db9298c025eacbf64)
Diff | [Diff](https://github.com/dotnet/runtime/compare/5097397670bb0d461d939644f66256258c0f1186...5c2326596dc0b21583dbba5db9298c025eacbf64)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Tests.Perf_Path

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

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

| 599.55 ns | 432.69 ns | 0.72 | 0.58 | 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.IO.Tests.Perf_Path*'
```

### System.IO.Tests.Perf_Path.GetRandomFileName

#### 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 | [5097397670bb0d461d939644f66256258c0f1186](https://github.com/dotnet/runtime/commit/5097397670bb0d461d939644f66256258c0f1186)
Compare | [5c2326596dc0b21583dbba5db9298c025eacbf64](https://github.com/dotnet/runtime/commit/5c2326596dc0b21583dbba5db9298c025eacbf64)
Diff | [Diff](https://github.com/dotnet/runtime/compare/5097397670bb0d461d939644f66256258c0f1186...5c2326596dc0b21583dbba5db9298c025eacbf64)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

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

| 557.49 ns | 378.60 ns | 0.68 | 0.32 | 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.Tests.Perf_Guid*'
```

### System.Tests.Perf_Guid.NewGuid

#### 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 | [5097397670bb0d461d939644f66256258c0f1186](https://github.com/dotnet/runtime/commit/5097397670bb0d461d939644f66256258c0f1186)
Compare | [5c2326596dc0b21583dbba5db9298c025eacbf64](https://github.com/dotnet/runtime/commit/5c2326596dc0b21583dbba5db9298c025eacbf64)
Diff | [Diff](https://github.com/dotnet/runtime/compare/5097397670bb0d461d939644f66256258c0f1186...5c2326596dc0b21583dbba5db9298c025eacbf64)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Random

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

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

| 814.99 ns | 517.06 ns | 0.63 | 0.55 | 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.Tests.Perf_Random*'
```

### System.Tests.Perf_Random.ctor

#### 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)