Fast sites win: they rank better, convert better, and keep users happy. Performance optimization is a discipline that pays off across the board.
Start with measurement. Use Lighthouse, WebPageTest, and real-user monitoring to establish baselines. Focus on Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS). Identify the biggest bottlenecks before optimizing.
Images are often the largest payload. Serve modern formats (WebP, AVIF), use responsive images with srcset, and lazy-load below-the-fold content. Consider a CDN and image service for automatic optimization.
JavaScript can block rendering and interaction. Code-split routes and heavy components. Tree-shake and minify. Prefer server rendering or static generation where possible so the first paint is fast.
Caching and delivery matter. Set appropriate cache headers, use a CDN, and consider edge caching for dynamic content. Performance is not a one-time fix—monitor, iterate, and keep the budget in mind with every new feature.