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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Progressive Enhancement

A web design strategy that starts with basic functionality for all browsers and progressively adds advanced features for capable ones.

Structured Data (Schema.org)

A standardized vocabulary for marking up web content so search engines can understand and display it as rich results.

Software that sits between the request and response in a web application, performing processing like authentication or logging.

A property where performing an operation multiple times produces the same result as performing it once.

DOM (Document Object Model)

A programming interface for HTML documents that represents the page structure as a tree of objects that can be manipulated with JavaScript.

SPA (Single Page Application)

A web application that loads a single HTML page and dynamically updates content without full page reloads.

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