[Perf] Linux/arm64: 5 Improvements on 8/8/2026 5:46:44 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [f659b2cb8bff3a94be0adaec91c6775c1774a056](https://github.com/dotnet/runtime/commit/f659b2cb8bff3a94be0adaec91c6775c1774a056)
Compare | [d9162a8b5629465d37d6881f377e5773c202d1f7](https://github.com/dotnet/runtime/commit/d9162a8b5629465d37d6881f377e5773c202d1f7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f659b2cb8bff3a94be0adaec91c6775c1774a056...d9162a8b5629465d37d6881f377e5773c202d1f7)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_GC<Byte>

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

• [AllocateUninitializedArray - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 184.82 ns | 151.25 ns | 0.82 | 0.03 | False | | |
|

• [AllocateArray - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 101.02 ns | 86.36 ns | 0.85 | 0.06 | 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.Tests.Perf_GC*'
```

### System.Tests.Perf_GC<Byte>.AllocateUninitializedArray(length: 10000, pinned: False)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_GC<Byte>.AllocateArray(length: 1000, pinned: 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 | [f659b2cb8bff3a94be0adaec91c6775c1774a056](https://github.com/dotnet/runtime/commit/f659b2cb8bff3a94be0adaec91c6775c1774a056)
Compare | [d9162a8b5629465d37d6881f377e5773c202d1f7](https://github.com/dotnet/runtime/commit/d9162a8b5629465d37d6881f377e5773c202d1f7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f659b2cb8bff3a94be0adaec91c6775c1774a056...d9162a8b5629465d37d6881f377e5773c202d1f7)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in Exceptions.Handling

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

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

| 6.97 μs | 6.35 μs | 0.91 | 0.05 | False | | |
|

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

| 11.56 μs | 10.74 μs | 0.93 | 0.05 | 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 'Exceptions.Handling*'
```

### Exceptions.Handling.ThrowAndCatchDeep(kind: Software)

#### ETL Files

#### Histogram

#### JIT Disasms

### Exceptions.Handling.ThrowAndCatchDeep(kind: ReflectionSoftware)

#### 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 | [f659b2cb8bff3a94be0adaec91c6775c1774a056](https://github.com/dotnet/runtime/commit/f659b2cb8bff3a94be0adaec91c6775c1774a056)
Compare | [d9162a8b5629465d37d6881f377e5773c202d1f7](https://github.com/dotnet/runtime/commit/d9162a8b5629465d37d6881f377e5773c202d1f7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f659b2cb8bff3a94be0adaec91c6775c1774a056...d9162a8b5629465d37d6881f377e5773c202d1f7)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Type

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

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

| 681.50 ns | 628.90 ns | 0.92 | 0.03 | 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_Type*'
```

### System.Tests.Perf_Type.GetType_InvalidName

#### 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)

Start with the performance workflow documentation and reproduce the reported filters through scripts/benchmarks_ci.py on ARM64 Ubuntu. Inspect src/benchmarks/micro/runtime/Exceptions/Handling.cs and src/benchmarks/micro/libraries/System.Runtime/Perf.Type.cs, then compare the listed benchmark results with the linked reports. Done requires a confirmed cause and a maintainer-agreed follow-up, but the issue does not define a specific change.

Written by the indexing model from the issue text.