[Perf] Linux/arm64: 3 Improvements on 4/10/2026 6:15:26 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [a181406886335da69df0c5bdc9a67ea5940ff116](https://github.com/dotnet/runtime/commit/a181406886335da69df0c5bdc9a67ea5940ff116)
Compare | [a86167c66c4c1a9e1ff315995b57b00bc705989a](https://github.com/dotnet/runtime/commit/a86167c66c4c1a9e1ff315995b57b00bc705989a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/a181406886335da69df0c5bdc9a67ea5940ff116...a86167c66c4c1a9e1ff315995b57b00bc705989a)
Configs | CompilationMode:tiered, RunKind:micro

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

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

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

| 74.75 ns | 39.97 ns | 0.53 | 0.08 | False | | |

[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<Char>.Reverse(Size: 512)

#### 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 | [a181406886335da69df0c5bdc9a67ea5940ff116](https://github.com/dotnet/runtime/commit/a181406886335da69df0c5bdc9a67ea5940ff116)
Compare | [a86167c66c4c1a9e1ff315995b57b00bc705989a](https://github.com/dotnet/runtime/commit/a86167c66c4c1a9e1ff315995b57b00bc705989a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/a181406886335da69df0c5bdc9a67ea5940ff116...a86167c66c4c1a9e1ff315995b57b00bc705989a)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Single>

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

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

| 577.98 ns | 530.59 ns | 0.92 | 0.05 | False | | |

[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.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives*'
```

### System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Single>.Sin(BufferLength: 128)

#### 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 | [a181406886335da69df0c5bdc9a67ea5940ff116](https://github.com/dotnet/runtime/commit/a181406886335da69df0c5bdc9a67ea5940ff116)
Compare | [a86167c66c4c1a9e1ff315995b57b00bc705989a](https://github.com/dotnet/runtime/commit/a86167c66c4c1a9e1ff315995b57b00bc705989a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/a181406886335da69df0c5bdc9a67ea5940ff116...a86167c66c4c1a9e1ff315995b57b00bc705989a)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Buffers.Tests.SearchValuesByteTests

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

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

| 27.52 ns | 23.60 ns | 0.86 | 0.03 | False | | |

[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.Tests.SearchValuesByteTests*'
```

### System.Buffers.Tests.SearchValuesByteTests.IndexOfAnyExcept(Values: "abcdefABCDEF0123456789Ü")

#### 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)