Web Performance Optimization: Complete Guide

Web performance is crucial for user experience and SEO. This guide will teach you the best practices.

Core Web Vitals Metrics

1. Largest Contentful Paint (LCP)

Measures when the largest visible element loads. Goal: < 2.5s

2. First Input Delay (FID)

Measures time to first interaction. Goal: < 100ms

3. Cumulative Layout Shift (CLS)

Measures visual stability. Goal: < 0.1

Optimization Techniques

Lazy Loading

<img src="image.jpg" loading="lazy" alt="Description" />

Code Splitting

const LazyComponent = lazy(() => import('./LazyComponent'));

Conclusion

Performance optimization is an ongoing process that requires constant measurement and improvement.