# Performance Benchmark

> Runs performance benchmarks on YARS with long simulations to detect performance regressions

- Skill: `majiayu000/performance-benchmark-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/performance-benchmark-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/performance-benchmark-2/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/majiayu000/performance-benchmark-2

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# Performance Benchmark

This skill runs performance benchmarks to measure simulation speed and detect performance regressions.

## Usage

Automatically invoked when:
- User asks to benchmark or test performance
- After optimization work
- Comparing performance before/after changes
- Validating that refactoring didn't slow down simulation

## Benchmark Tests

### Test 1: Braitenberg Extended Run
```bash
cd build
time timeout 120s ./bin/yars --iterations 10000 --xml ../xml/braitenberg_logging.xml
```

### Test 2: Falling Objects Physics Test
```bash
cd build
time timeout 120s ./bin/yars --iterations 10000 --xml ../xml/falling_objects.xml
```

## Success Criteria

- ✅ Simulations complete without timeout
- ✅ Time measurements recorded
- ✅ Performance within acceptable range
- ✅ No crashes during extended runs

## Reporting

Reports should include:
- Real/user/sys time for each test
- Iterations per second
- Comparison with previous benchmarks if available
- Any performance degradation warnings

## Notes

- Should be run with release build for accurate results
- Use timeout to prevent runaway simulations
- Benchmark results vary by hardware
- Track trends over time rather than absolute values