I have published a website with Web Performance Snippets to make it more user-friendly, more orderly, and with a search feature ⚡️💾 https://t.co/fDpDDY46zs #WebPerf #Performance #PerfTools

Lazy loading out-of-viewport images can make the main content on your website load faster. ⬇️ Learn how in this video. https://t.co/KqjaZEwsLu

Look at that 🤩 Safari now supports #LCP and #INP as well! And we can clearly see it in our data 💪 Dates: 🗓️ Nov 3rd: Safari rolled out support in their 26.2 beta release 🗓️ Dec 12th: Safari released it to the public 1/4

You can now measure LCP and INP scores in both Safari and Firefox! https://t.co/xhZ8G6UJqT

https://t.co/t4dDk3GWri

Missed out Robinhood Presents: YES/NO? Here's a replay for you.

🚀 MAJOR DevTools Update! I've upgraded the CSS Media Queries Analysis snippet to instantly reveal the hidden cost of shipping unused CSS. Problem: Mobile users often download 50KB+ of desktop-only CSS that blocks rendering and kills performance. New Feature: Performance Impact

⚡Featured posts this week: ✨ Anatomy of a WebPerfReport: @WebPerfReport ✨ WebKit Features for Safari 26.2: @jensimmons ✨ How Monrif improved engagement by 8.9%: Fabrizio Guerra Gianni Onnis ✨ How to load CSS (fast): @yoavweiss 🙏Special thanks to the authors! #webperf

Web Performance Calendae day 13 with Yoav Weiss (@yoavweiss) showing us a clever and creative way to ship *only* critical/necessary CSS for each page type (home, search, etc) *and* also avoid duplicating code in CSS bundles. https://t.co/N5eI5BALBR

Slow interactions aren't always caused by specific UI elements, but can also be caused by global tracking scripts. Our new article discusses this and other findings on a real world website: https://t.co/xPcHIhhfai

Scroll-triggered animations are coming to Chrome early next year (and we've been really excited about this one for a bit!) 🥳 Unlike scroll-driven animations (already in Chrome & Safari), this API introduces "timeline-trigger" and "animation-trigger" to start an animation within

I took a look at Core Web Vitals on the Splunk homepage. Learn how content hidden by anti-flicker snippets, tracking scripts slowing down interactions, and large images embedded in the HTML impact user experience. https://t.co/cg9beA3osw

Reply with all your Opus 4.5 gripes so we can fix everything before our next model The more specific (including prompts), the more likely we'll be able to fix it!

Throttling the network in Chrome DevTools might not do what you think it does! Depending on how the network is throttled you'll see different loading behavior and different metrics. https://t.co/WYDXOsjhZr

I really love the page transition on PerfPlanet’s Calendar 🤩 Smooth details like this make a big difference in web performance and UX. #WebPerf #PerfPlanet #UX

First comes dirt, then comes energy dominance. Construction on G2_Austin has begun. A 2.1GW solar cell fab in Texas. This is more than breaking ground. This is breaking free from energy dependence by building an American supply chain.

Get ready for the latest updates rolling out in Chrome 143 → https://t.co/ko5kfVXEsI This release includes font-language-override, anchored fallback container queries, side-relative background syntax, and more.

Want to optimize images in your Next.js app? Our new guide explains how to use the <Image> component and optimize it for performance. https://t.co/Cf8nAMQVtX

🎉 And we're live! 🎉 We just launched CSS Wrapped 2025: our annual recap of all things CSS & web UI that landed in Chrome over the course of the year. 🚀 This is a big one! We highlighted 22 new features to help you build better on the web. Check out:

Tag a future developer… or better yet, ALL future web developers! @ChromeDevTools is my favorite tool for debugging the web, especially when I'm working on Web Performance The Chrome DevTools team is amazing and consistently keeps improving it #ChromeDevTools #WebDev

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🎁 CSS Wrapped is back! In 2025, we didn't just build the web; we sculpted it. Let’s have a look at how Chrome shaped the web this year → https://t.co/UHwFButgEt

I just sponsored @kom_256. Go sponsor your open source dependencies! https://t.co/kzeO4MJfRa #OpenSource #OpenSourceSupport

🥱 How can lazy loading below-the-fold images speed up your website? Browsers often can't correctly prioritize images when loading a page. Content for a footer image might arrive before the main image. Deferring offscreen images fixes that. https://t.co/Sb22M4ZcTZ