Lighthouse says: "Speed Index shows how quickly the contents of a page are visibly populated." It sounds simple. It is not. Here's what it actu...

Lighthouse says: "First Meaningful Paint measures when the primary content of a page is visible." But FMP is deprecated. Here's why Google kill...

Lighthouse says: "Largest Contentful Paint marks the time at which the largest text or image is painted." Here's what that means, why it matter...

What does "First Contentful Paint marks the time at which the first text or image is painted" mean in Lighthouse? This metric tells you how long us...

What does "Has a meta name viewport tag with width or initial-scale" mean in Lighthouse? This audit checks if your page is mobile-ready. Missing it...

Request Metrics normalizes URLs to lowercase by default. But some frameworkstreat casing as meaningful. Now you can preserve the original casing with anew se...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

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Astro description

Images engage users, drive clicks, and generally make everything better--*except for performance*.Images are giant blobs of bytes that are usually the slowes...

Learn how HTTP caching headers can dramatically improve your website performance. This guide covers everything from basic concepts to advanced implementation...

Images engage users, drive clicks, and generally make everything better--*except for performance*.Images are giant blobs of bytes that are usually the slowes...

Images engage users, drive clicks, and generally make everything better--*except for performance*.Images are giant blobs of bytes that are usually the slowes...

Images engage users, drive clicks, and generally make everything better--*except for performance*.Images are giant blobs of bytes that are usually the slowes...

Long animation frames (LoAFs) can leave your website feeling slow and unresponsive. Learn about Long Animation Frames, what they are, and how to measure them.

Learn how HTTP caching headers can dramatically improve your website performance. This guide covers everything from basic concepts to advanced implementation...

Long animation frames (LoAFs) can leave your website feeling slow and unresponsive. Learn about Long Animation Frames, what they are, and how to measure them.

HTTP/3 promises speed and efficiency, but does it actually deliver? In our latest article, we put HTTP/3 to the test,comparing it against HTTP/2 in real-worl...

Long animation frames (LoAFs) can leave your website feeling slow and unresponsive. Learn about Long Animation Frames, what they are, and how to measure them.