Web Development Intermediate

What is Web Performance Optimization?

Techniques to make websites load faster and respond more quickly, improving user experience and search engine rankings.

Web performance optimization covers reducing page load time, time to interactive, and perceived performance. Key techniques include image optimization (WebP format, responsive images, lazy loading), CSS/JS minification and bundling, critical CSS inlining, code splitting, browser caching with proper Cache-Control headers, CDN usage, Gzip/Brotli compression, reducing DNS lookups, preconnect/preload hints, and server-side rendering. Core Web Vitals (LCP, FID/INP, CLS) are Google's performance metrics affecting SEO rankings. Tools like Lighthouse, PageSpeed Insights, and WebPageTest measure and recommend improvements. Every 100ms of latency can reduce conversion rates.

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