⚡Featured posts this week: ✨Why Your Server Is Paying for Your CSS: David Lewis ✨Nuxt Scripts for improved Perf and Sec: @jacobandrewsky.bsky.social ✨Chasing BFCache navigations: Nicolas Hodin ✨TTFB doesn’t mean what you think: @programmingart.bsky.social 🙏Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #52 is out! ✅ 🎇 🍾 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report: 👉 webperformancereport.com 🛡️ HTTP Security Report: 👉 webperformancereport.com/httpo/ ♿️ A11ty Report: 👉 webperformancereport.com/wave/ #webperf #websecurity #accessibility #a11ty #ai

Web Performance Calendar day 24 with @programmingart.bsky.social on TTFB. Yes, it's one of those X-mas Eves where we cuddle by the fire, drop everything and immerse into re-learning and re-evaluating what we thought we knew about a concept we use daily calendar.perfplanet.com/2025/ttfb-do...

⚡Featured posts this week: ✨ LCP and INP are now Baseline: @tunetheweb.com @mmocny.com ✨ Faster pages with Compression Dictionaries: @karlijnlowik.bsky.social ✨ A Short History of Perf Engineering: Alex Podelko ✨ Next.js Perf Optimization: Dany Paredes 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #51 is out! ✅ 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report:👉 webperformancereport.com 🛡️ HTTP Security Report:👉 webperformancereport.com/httpo/ ♿️ A11ty Report:👉 webperformancereport.com/wave/ #webperf #ux #seo #websecurity #accessibility #a11ty #ai

⚡ We’ve made public the Perf Links dataset we update every week. A simple, week-by-week collection of Web Performance resources. All links from this year (including this week): github.com/WebPerforman... #webperf

Web Performance Calendar day 17 with Adam Zachary Wasserman on outperforming modern frameworks with this one weird little trick calendar.perfplanet.com/2025/the-old...

Web Performance Calendar day 16 with @sandervs.bsky.social on why the word "millisecond" doesn't belong in the boardroom calendar.perfplanet.com/2025/why-we-...

Web Performance Calendar day 15 with @nicj.net, @cliffcrocker.bsky.social and @karlijnlowik.bsky.social Löwik presenting an update on W3's RUM Community Group and YOU calendar.perfplanet.com/2025/rumcg-a...

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

🎉 WebPerformance Report Week #50 is out! ✅ 🔍Ready for next Week? Don’t miss out! ⚡ Web Performance Report:👉 webperformancereport.com 🛡️ HTTP Security Report:👉 webperformancereport.com/httpo/ ♿️ A11ty Report:👉 webperformancereport.com/wave/ #webperf #cybersecurity #websecurity #accessibility #A11ty #AI

Safari 26.2 is here with 65 features + 165 bug fixes — including field-sizing, Navigation API, Largest Contentful Paint, command & commandfor, CHIPS opt-in partitioned cookies, scrollend event, random(), WebGPU in WebXR, scrollbar-color, hidden=until-found and much more! webkit.org/blog/17640/w...

Web Performance Calendar day 8 with Edwin Molina Hernández @webperfreport.bsky.social showing how a great perf report is more than numbers, it turns metrics into actionable answers to questions like "what improved?", "what regressed?", and "what to do next?". calendar.perfplanet.com/2025/the-ana...

⚡Featured posts this week: ✨ Timeline of web features and browser support: @rviscomi.dev ✨ Fast by Default: @denodell.bsky.social ✨ Analyzing CSS Media Queries to Optimize Perf: @nucliweb.net ✨ What was new in web perf in 2025: @mattzeunert.com 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #49 is out!✅ 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report:👉 webperformancereport.com 🛡️ HTTP Security Report:👉 webperformancereport.com/httpo/ ♿️ A11ty Report:👉 webperformancereport.com/wave/ #webperf #cybersecurity #websecurity #accessibility #A11ty #AI

🤩We just opened the Public Preview of our Reporting as a Service (RaaS) platform before the general release. Users from different countries are already accessing their personal Boards. Explore the platform by getting your own report: 👉 webperformancereport.com #webperf

⚡Featured posts this week: ✨ The Performance Inequality Gap, 2026: @infrequently.org ✨ How fast can browsers process base64 data?: @lemire.bsky.social ✨ Explaining the Accessible Benefits: @geoffgraham.me ✨ Why use React?: @adactio.com 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #48 is out! ✅ 🔍 Ready for next Week? Don’t miss out! ⚡Web Performance Report:👉 webperformancereport.com 🛡️HTTP Security Report:👉 webperformancereport.com/httpo/ ♿️A11ty Report:👉 webperformancereport.com/wave/ #webperf #cybersecurity #websecurity #accessibility #A11ty #AI

🎥 ✨ SPDY STREAM 019 ✨ I'd like to give a big thank you to Edwin for joining the stream today to discuss the exciting vision behind @webperfreport.bsky.social . What began as a small initiative, expanded to delivering performance and user experience data to large organizations!

Happy Friday! We quietly announced our next guest yesterday. ✨ SPDY STREAM 019 ✨ featuring Edwin M. Hernández 🇪🇨🇩🇪. The maintainer of the @webperfreport.bsky.social will join us to talk about his powerful & personalized perf report 📆 Wed November 26th ⏰ 1pm EST, 7pm CET 🔗 youtube.com/live/xEOLW_F...

⚡Featured posts this week: ✨ WebPerf Report on SPDY STREAM: @henrihelvetica.bsky.social ✨ WordPress 6.9 Perf Landings: @weston.ruter.net ✨ I Built the Same App 10 Times: @cheddybop.bsky.social ✨ Start building with Gemini 3: @officiallogank.bsky.social 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #47 is out! ✅ 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report: 👉 webperformancereport.com 🛡️ HTTP Security Report: 👉 webperformancereport.com/httpo/ ♿️ A11ty Report: 👉 webperformancereport.com/wave/ #webperf #websecurity #accessibility #A11ty #AI

⚡Featured posts this week: ✨ AI assistance for performance: @matthiasrohmer.bsky.social ✨ The Web Animation Performance: @citizenofnowhe.re ✨ How Fast Is Fast Enough?: @tammyeverts.com ✨ Performance is about people: @markzeman.com 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #46 is out! ✅ 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report: 👉 webperformancereport.com 🛡️ HTTP Security Report: 👉 webperformancereport.com/httpo/ ♿️ A11ty Report: 👉 webperformancereport.com/wave/ #webperf #websecurity #accessibility #A11ty #AI

Testing @developer.chrome.com Side by Side view with two WebPerformance Report results. A clean way to compare performance changes across deliveries. Small SaaS preview. Coming soon… ⚡ WebPerformance Report Get your own report: 👉 webperformancereport.com #webperf

⚡Featured posts this week: ✨ @cloudflare.social TELESCOPE: @sergeyche.dev & @tkadlec.bsky.social ✨ Optimizing Webfonts: Lucas Dohmen ✨ How to optimize SVG files: @laurakalbag.bsky.social ✨ Using the Web Monetization API: @tomayac.com 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #45 is out! ✅ 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report: 👉 webperformancereport.com 🛡️ HTTP Security Report: 👉 webperformancereport.com/httpo/ ♿️ A11ty Report: 👉 webperformancereport.com/wave/ #webperf #websecurity #accessibility #A11ty #AI

My gist “How Browsers Work” has been updated with a new post: “How modern browsers work” by @addyosmani.bsky.social gist.github.com/nucliweb/c16... #WebPerf #Browser #WebDevelopment

💡Small UI update! The Core Web Vitals section now shows Lab and Field Data separately, making results easier to read and compare. For pages with Chrome UX Report data, you can now jump straight to CrUX Vis right from your report. Small detail, big clarity improvement.⚡ #WebPerf #CrUX #CoreWebVitals

If you are interested and want to learn about Web Performance, I recommend subscribing to @henrihelvetica.bsky.social's channel, where you will find high-quality videos from leading figures in the Web Performance community 📺 www.youtube.com/@HenriHelvet... #WebPerf #Performance #Learning #YouTube

💫 When performance experts choose WebPerformance Report to simplify and share their insights, it reinforces our mission to make data more actionable for everyone. Thank you, Jacob @kurtextrem.de, for trusting WPR to bring clarity to web performance. ⚡ 👉 webperformancereport.com#Testimonials #webperf

⚡Featured posts this week: ✨ Improving perf by prefetching product pages: @stoyan.me ✨ HTTPS by default: Andrew R. Whalley ✨ Write Code That Runs in the Browser: @jim-nielsen.com ✨ Why is Web Perf Undervalued?: Blaine O'Brien 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #44 is out! ✅ 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report: 👉 webperformancereport.com 🛡️ HTTP Security Report: 👉 webperformancereport.com/httpo/ ♿️ A11ty Report: 👉 webperformancereport.com/wave/ #webperf #websecurity #accessibility #A11ty #AI

Interesting! Etsy implemented speculation rules and got these results: 👍 Time to First Byte on the listing page improved 23.6% 👍 First Contentful Paint improved 20.7% 👍 Largest Contentful Paint improved 21.1% 👍 DOMContentLoaded improved 20.4% #PerfNow #webperf www.etsy.com/codeascraft/...

"0 kB of JavaScript is not a feature" - @rich-harris.dev #perfnow #WebPerf

📕 The History of Core Web Vitals 👉🏻 Addy tells the story behind Core Web Vitals, a popular set of metrics for measuring Web performance and its impact on user experience. https://addyosmani.com/blog/core-web-vitals/

🎉 New on WebPerformance Report: WAVE Accessibility Report ♿️ In collaboration with WAVE by @webaim.bsky.social, we’re bringing accessibility insights straight to your inbox. Because a truly performant web must also be an accessible one. 👉 webperformancereport.com/wave #WebPerf #Accessibility #A11y

⚡Featured posts this week: ✨ The History of Core Web Vitals: @addyosmani.bsky.social ✨ Meet our new browser—ChatGPT Atlas: OpenAI ✨ WCAG 2.2 is now ISO/IEC 40500:2025: W3C ✨ Progressive image rendering: @jakearchibald.com 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #43 is out! ✅ 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report: 👉 webperformancereport.com 🛡️ HTTP Security Report: 👉 webperformancereport.com/httpo/ #webperf #corewebvitals #ux #seo #cybersecurity #websecurity #accessibility #A11ty #AI

💪The greatest reward comes when those we admire recognize our work. Thank you, Barry @tunetheweb.com, for your words. They inspire us to keep promoting the culture of Web Performance around the world. ⚡ 👉 webperformancereport.com#Testimonials #WebPerf

Sponsorship renewed again ⚡ Thrilled to share that Catchpoint, the company behind #WebPageTest, keeps sponsoring WebPerformance Report for another year. Together we promote a culture of performance, turning data into clarity, trust, and results. 👉 webperformancereport.com #WebPerf

⚡Featured posts this week: ✨ About WebPerformance Report: Edwin Molina ✨ How Framer reduced LCP using Rolldown: Michael Dong ✨ The Core Web Vitals Tech Report: @httparchive.org ✨ The AI Cloud: Guillermo Rauch 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #42 is out! ✅ Join our growing community and subscribe today: ⚡ Web Performance Report: 👉 webperformancereport.com 🛡️ HTTP Security Report: 👉 webperformancereport.com/httpo/ #webperf #corewebvitals #ux #seo #cybersecurity #websecurity #AI

After thousands of reports delivered, we understood who we are and what we stand for. ⚡ WebPerformance Report is not just about speed. It is about clarity, trust, and impact. 💙 Discover our vision: 👉 webperformancereport.com/about-us #WebPerf #WebSecurity #Accessibility #AI

⚡Featured posts this week: ✨ What's new in Lighthouse 13: @tunetheweb.com ✨ 11ty Hacks for Fun and Performance: @infrequently.org ✨ Launch the React Foundation: @linuxfoundation.org ✨ ShopifyQL is now in the Admin API: Shopify 🙏 Special thanks to the authors! #webperf

🎉 WebPerformance Report Week #41 is out! ✅ 🔍 Ready for next Week? Don’t miss out! ⚡ Web Performance Report: 👉 webperformancereport.com 🛡️ HTTP Security Report: 👉 webperformancereport.com/httpo/ #webperf #corewebvitals #ux #seo #cybersecurity #websecurity #AI

We’ve just released some shiny new docs for the Insights so you’ll know exactly what they measure and how to pass them. Check them out: developer.chrome.com/docs/perform...

I mentioned before that we’re switching Lighthouse Performance audits to the new and improved Insights. The same Insights that you can see in DevTools Performance panel traces. That’s happening in Lighthouse 13 due to be released very soon. Maybe even this week!

🚀 Exciting update from WebPerformance Report! Every WebPageTest report now includes an AI Insight✨, a concise executive summary built with #Gemini by Google. Our mission: make web performance data understandable and actionable for everyone. Try it yourself 👉 webperformancereport.com #webperf #AI

⚡Featured posts this week: ✨ How to enrich RUM data in Datadog: @gokberknur.bsky.social ✨ Time to Brand Identity: @duffeh.bsky.social ✨ Core Web Vitals mystery: @tunetheweb.com ✨ Safari Tech Preview now supports INP: Apple 🙏 Special thanks to the authors! #webperf