React Server Components (RSC) render exclusively on the server and are never included in the bundle. RSCs can improve web performance and Largest Contentful Paint by shipping less JavaScript to the browser.

Learn how to use requestAnimationFrame to schedule UI updates efficiently. Understand the differences between requestAnimationFrame and setTimeout and other APIs.

Google limits how much HTML content it processes when crawling a page. Learn what the 2MB file size limit means for SEO and how to diagnose large HTML documents.

Learn why websites often feel slow on mobile devices—even when they perform well on desktop. This article explains the difference between actual and perceived performance, highlights the most common mobile performance bottlenecks, and outlines practical, real-world optimization strategies based on modern web performance best practices and Core Web Vitals.

An analysis of the most commonly used Consent Management Platforms and their impact on Interaction to Next Paint.

Learn how to optimize your ecommerce website for search engines in 2026. This guide covers keyword research, site architecture, technical SEO, Core Web Vitals, and strategies for AI-powered search.

Learn what JPEG XL is, how it compares to other image formats like AVIF and WebP, and whether you should use it on your website.

React Compiler helps optimize React performance by automatically memoizing your app, which can improve your Interaction to Next Paint (INP) scores, eliminate unnecessary re-renders, and make your code cleaner.

Learn how website speed impacts user experience and how you can measure performance and business outcomes.

Learn how to optimize React application performance using useMemo and useCallback. This article explains when memoization truly matters, highlights common performance pitfalls, and provides practical examples and best practices—along with references to real-world React performance guidelines used by modern teams.

Learn why Lighthouse scores differ between tools like PageSpeed Insights and Chrome DevTools, and how to diagnose and fix these discrepancies.

Learn how to measure the performance of your React app and identify what's slowing it down.

How we discovered and fixed a lodash memoize memory leak that caused out of memory crashes in our Google Cloud Functions.

Learn how we've improved real user monitoring, synthetic testing, and team collaboration.

Firefox and Safari now support LCP and INP Core Web Vitals metrics, providing new insight into real visitor experience.

Take a look at Core Web Vitals on a real website to see how it could be optimized.

Learn how to optimize images in Next.js using the next/image component. Discover best practices for responsive images, lazy loading, and improving Core Web Vitals with automatic image optimization.

Find out how web performance changed in 2025, and what changes are coming up in the future.

We take a look at a real-world website to investigate what's slowing it down and how it could be optimized.

HTML parsing speed speed depends on the processing power of the visitor's device. I collected two quick datapoints.