What is Performance Optimization?
Performance optimization involves techniques to make web applications load faster and run smoother. This includes code splitting, lazy loading, image optimization, caching, and reducing JavaScript bundle size.
Why is it Important?
Performance directly impacts user experience, SEO, and conversion rates. Google uses Core Web Vitals as ranking signals. Understanding performance tools and optimization techniques separates good developers from great ones.
What to Learn
- Core Web Vitals (LCP, FID, CLS)
- Code splitting and lazy loading
- Image and font optimization
- Memoization (React.memo, useMemo, useCallback)
- Bundle analysis and tree shaking
- Service workers and caching
Career Relevance
Performance expertise is highly valued, especially for senior roles. Companies losing revenue to slow sites actively seek developers who can diagnose and fix performance issues.