dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 1 Improvement on 6/18/2026 3:29:39 AM +00:00

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aot-true arch-wasm arch-x64 branch-refs/heads/main compilationmode-wasm kind-micro Noise os-linux perf-improvement runkind-micro untriaged wasm-aot
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [631b884e3bad9c76b667005ff7fb3bd39864c3b1](https://github.com/dotnet/runtime/commit/631b884e3bad9c76b667005ff7fb3bd39864c3b1)
Compare | [50bc3b3e1fe96d95e7f04bd3189d9eb2c7a40b59](https://github.com/dotnet/runtime/commit/50bc3b3e1fe96d95e7f04bd3189d9eb2c7a40b59)
Diff | [Diff](https://github.com/dotnet/runtime/compare/631b884e3bad9c76b667005ff7fb3bd39864c3b1...50bc3b3e1fe96d95e7f04bd3189d9eb2c7a40b59)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Improvements in System.Runtime.Intrinsics.Tests.Perf_Vector128Of<Int16>

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

  • [SquareRootBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 12.43 ns | 8.46 ns | 0.68 | 0.27 | 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.Runtime.Intrinsics.Tests.Perf_Vector128Of*'
```

### System.Runtime.Intrinsics.Tests.Perf_Vector128Of<Int16>.SquareRootBenchmark

#### 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)

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with the benchmark source at src/benchmarks/micro/libraries/System.Runtime.Intrinsics/Perf_Vector128OfT.cs#L160-L161 and reproduce the reported case using the benchmarks_ci.py command. Review the linked test report and baseline/compare data to determine whether the improvement requires a runtime change. Done means the performance difference has an identified cause and an agreed follow-up.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, wasm
Domain
performance
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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