[Perf] Linux/x64: 2 Improvements on 5/15/2026 3:25:59 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [ea32e277e519d1e08f2498c142cb55f56d681114](https://github.com/dotnet/runtime/commit/ea32e277e519d1e08f2498c142cb55f56d681114)
Compare | [9b73bbe9535e4f2c4a2744b21508d674b8c28c31](https://github.com/dotnet/runtime/commit/9b73bbe9535e4f2c4a2744b21508d674b8c28c31)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ea32e277e519d1e08f2498c142cb55f56d681114...9b73bbe9535e4f2c4a2744b21508d674b8c28c31)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Memory.Span<Byte>

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

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

| 17.32 ns | 15.37 ns | 0.89 | 0.30 | False | | |
|

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

| 17.35 ns | 15.48 ns | 0.89 | 0.23 | False | | |

![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.Memory.Span*'
```

### System.Memory.Span<Byte>.CopyToSame(Size: 33)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span<Byte>.CopyToSame(Size: 3000)

#### 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)