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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HTTP Status Codes

Standardized three-digit codes returned by web servers to indicate the result of a client's HTTP request.

A high-performance RPC framework using Protocol Buffers and HTTP/2 for efficient service-to-service communication.

A JavaScript file that runs in the background, enabling offline support, push notifications, and background sync for web apps.

Static Site Generator (SSG)

A tool that generates a complete static HTML website from templates and content at build time, requiring no server-side processing.

HTTP headers that control cross-origin resource sharing between different domains, specifying allowed origins, methods, and headers.

Web Accessibility (a11y)

The practice of designing websites that can be used by people with disabilities, following WCAG guidelines.

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