performance-optimizer
Skill: Performance Optimizer
Identify and resolve performance bottlenecks. Measure first, optimize second.
Principles
- Measure first, optimize second
- Optimize the bottleneck, not everything
- 80/20: 80% of slowness is in 20% of code
Profiling
| Layer | Tools | Metrics |
|---|---|---|
| Frontend | Lighthouse, DevTools | FCP, LCP, TTI, CLS |
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