performance-optimization
Diagnose and fix performance bottlenecks across React frontends and database backends.
- Covers frontend optimization: React.memo, useMemo, useCallback, lazy loading, code splitting, image optimization, and bundle analysis
- Includes backend strategies: N+1 query fixes, database indexing, Redis caching, and API compression
- Provides measurement tools and workflows using Lighthouse, Web Vitals, and webpack-bundle-analyzer
- Emphasizes profiling first, incremental improvements, and continuous monitoring with performance regression tests
Performance Optimization
When to use this skill
- Slow page loads: low Lighthouse score
- Slow rendering: delayed user interactions
- Large bundle size: increased download time
- Slow queries: database bottlenecks
Instructions
Step 1: Measure performance
Lighthouse (Chrome DevTools):
# CLI
npm install -g lighthouse
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