performance-optimization
Performance Optimization
Overview
Optimize performance with a measure-first approach. Never optimize without data. Establish baselines, identify bottlenecks, apply targeted fixes, and verify improvements.
When to Use
- Performance requirements are stated or implied
- You suspect a regression after recent changes
- Page load or interaction speed is noticeably slow
- Bundle size has grown beyond acceptable thresholds
- Database queries are slow under load
Core Web Vitals Targets
| Metric | Good | Needs Improvement | Poor |
|---|---|---|---|
| LCP (Largest Contentful Paint) | < 2.5s | 2.5s - 4s | > 4s |
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