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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.

Related Terms

MVC (Model-View-Controller)
An architectural pattern that separates an application into three components: data (Model), interface (View), and logic (Controller).
Web Accessibility (a11y)
The practice of designing websites that can be used by people with disabilities, following WCAG guidelines.
AJAX
A technique for making asynchronous HTTP requests from a web page without reloading the entire page.
CSS Flexbox
A CSS layout model that provides efficient arrangement of items within a container, handling alignment, distribution, and spacing.
SEO (Search Engine Optimization)
The practice of optimizing websites to rank higher in search engine results, increasing organic traffic.
CORS Preflight
An automatic OPTIONS request sent by browsers before certain cross-origin requests to check if the actual request is permitted.
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