Web Performance

Web performance directly impacts user experience, conversion rates, and search rankings, making optimization one of the most impactful investments you can make in your digital presence with benefits that touch every visitor and every page across your entire site. Our comprehensive web performance guides cover measurement, diagnosis, and optimization across every factor affecting site speed and responsiveness from server to screen at every layer of the stack. You will learn performance measurement using appropriate tools and metrics, understanding what Core Web Vitals, lab data, and field data each reveal about real user experience and how they differ in important ways that affect your optimization priorities. We explore diagnostic approaches that identify specific bottlenecks limiting your performance, from server response time and time to first byte through resource loading, parsing, and rendering completion that determines when users can interact. Our guides cover optimization techniques organized by impact potential, helping you prioritize improvements that will make the biggest differences to actual user experience rather than pursuing marginal gains that consume resources without meaningful benefit. You will learn image optimization including format selection between JPEG, PNG, WebP, and AVIF, compression techniques that reduce file sizes dramatically, responsive images that serve appropriate sizes, and lazy loading that often provides the largest performance gains with relatively straightforward implementation. We address code optimization covering JavaScript delivery strategies, CSS optimization including critical CSS extraction, and reducing total code weight through minification, tree shaking, and code splitting. Our resources cover infrastructure and delivery optimization including hosting selection and configuration, CDN configuration and cache rules, and caching strategies at browser, CDN, and application levels. You will learn to monitor performance over time, catching regressions quickly before they affect significant traffic and demonstrating improvement impact through before-and-after comparisons. These guides provide systematic approaches to achieving genuinely fast, responsive websites that users and search engines prefer.