dotnet / dotnet/perf-autofiling-issues

[Perf] Windows/arm64: 3 Regressions on 8/20/2026 10:26:14 AM +00:00

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arch-arm64 branch-refs/heads/main codegentype-jit compilationmode-tiered kind-android_scenarios linkingtype-dynamic Noise os-windows perf-regression runkind-android_scenarios runtime-coreclr runtimetype-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | Windows 10.0.22621
Queue | Pixel
Baseline | [2eebfbf193bc0be8b44f65c9f94d536cf1c3e699](https://github.com/dotnet/runtime/commit/2eebfbf193bc0be8b44f65c9f94d536cf1c3e699)
Compare | [361539de30ffe5c5ccb7cbdfa230747411ec7faf](https://github.com/dotnet/runtime/commit/361539de30ffe5c5ccb7cbdfa230747411ec7faf)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2eebfbf193bc0be8b44f65c9f94d536cf1c3e699...361539de30ffe5c5ccb7cbdfa230747411ec7faf)
Configs | CodeGenType:JIT, CompilationMode:tiered, LinkingType:dynamic, RunKind:android_scenarios, RuntimeType:coreclr

### Regressions in SOD - Android HelloWorld Extracted Size

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

  • [SOD - Android HelloWorld Extracted Size - pub\lib\arm64-v8a\libSystem.Globalization.Native.so]()
  • [ADX - Test Multi Config Graph]()
| 70.73 KB | 70.56 KB | 1.00 | 0.00 | True | | |
|
  • [SOD - Android HelloWorld Extracted Size - pub\assets\System.Private.CoreLib.dll]()
  • [ADX - Test Multi Config Graph]()
| 2.54 MB | 2.55 MB | 1.00 | 0.00 | True | | |
|
  • [SOD - Android HelloWorld Extracted Size - Aggregate - .dll]()
  • [ADX - Test Multi Config Graph]()
| 2.88 MB | 2.88 MB | 1.00 | 0.00 | True | | |

![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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'SOD - Android HelloWorld Extracted Size*'
```

### SOD - Android HelloWorld Extracted Size

#### 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 benchmarking workflow in docs/benchmarking-workflow-dotnet-runtime.md and reproduce the SOD - Android HelloWorld Extracted Size benchmark using the provided benchmarks_ci.py command. Compare the baseline and comparison commits and inspect the linked performance report; done means identifying the cause of the three Windows/arm64 size regressions and verifying the benchmark no longer regresses.

Written by the indexing model from the issue text.

Assessment

Tech stack
git, python
Domain
operating-systems, performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
35/100

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