[Perf] Linux/arm64: 3 Improvements on 1/6/2026 4:59:14 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [45d7d633ffd61888684b4c6d488a36651d44be9b](https://github.com/dotnet/runtime/commit/45d7d633ffd61888684b4c6d488a36651d44be9b)
Compare | [841eb8519b08e6cc074be1cb84d25cd4e8e5def0](https://github.com/dotnet/runtime/commit/841eb8519b08e6cc074be1cb84d25cd4e8e5def0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/45d7d633ffd61888684b4c6d488a36651d44be9b...841eb8519b08e6cc074be1cb84d25cd4e8e5def0)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Buffers.Tests.RentReturnArrayPoolTests<Object>

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

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

| 57.18 μs | 49.89 μs | 0.87 | 0.47 | 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.Buffers.Tests.RentReturnArrayPoolTests*'
```

### System.Buffers.Tests.RentReturnArrayPoolTests<Object>.SingleParallel(RentalSize: 4096, ManipulateArray: False, Async: True, UseSharedPool: False)

#### 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 | [45d7d633ffd61888684b4c6d488a36651d44be9b](https://github.com/dotnet/runtime/commit/45d7d633ffd61888684b4c6d488a36651d44be9b)
Compare | [841eb8519b08e6cc074be1cb84d25cd4e8e5def0](https://github.com/dotnet/runtime/commit/841eb8519b08e6cc074be1cb84d25cd4e8e5def0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/45d7d633ffd61888684b4c6d488a36651d44be9b...841eb8519b08e6cc074be1cb84d25cd4e8e5def0)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Buffers.Tests.RentReturnArrayPoolTests<Byte>

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

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

| 56.68 μs | 48.26 μs | 0.85 | 0.45 | 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.Buffers.Tests.RentReturnArrayPoolTests*'
```

### System.Buffers.Tests.RentReturnArrayPoolTests<Byte>.SingleParallel(RentalSize: 4096, ManipulateArray: False, Async: True, UseSharedPool: False)

#### 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 | [45d7d633ffd61888684b4c6d488a36651d44be9b](https://github.com/dotnet/runtime/commit/45d7d633ffd61888684b4c6d488a36651d44be9b)
Compare | [841eb8519b08e6cc074be1cb84d25cd4e8e5def0](https://github.com/dotnet/runtime/commit/841eb8519b08e6cc074be1cb84d25cd4e8e5def0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/45d7d633ffd61888684b4c6d488a36651d44be9b...841eb8519b08e6cc074be1cb84d25cd4e8e5def0)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Threading.Tests.Perf_Timer

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

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

| 330.22 secs | 277.76 secs | 0.84 | 0.52 | 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.Threading.Tests.Perf_Timer*'
```

### System.Threading.Tests.Perf_Timer.AsynchronousContention

#### 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)