Optimizing Website Performance: A Complete Guide

Modern performance optimization starts with understanding the critical rendering path—how browsers parse HTML, CSS, and JavaScript to display pages. Optimizing this path means prioritizing above-the-fold content and deferring non-essential resources.Image optimization remains crucial, with modern formats like WebP and AVIF offering superior compression. Lazy loading images and components ensures users only download what they actually need. Code splitting breaks large JavaScript bundles into smaller, more manageable chunks.Caching strategies, CDN implementation, and HTTP/2 all contribute to faster delivery. Google's Core Web Vitals provide clear metrics to target: LCP for loading performance, FID for interactivity, and CLS for visual stability. Regular performance audits help catch regressions before they impact users.