Calibre

The pitch for single page apps was always “it’s faster after the first load”. Google’s Core Web Vitals, used in search ranking, now measure soft navigations. It’s true: LCP drops by about a third. But, I don't think SPAs are ever really worth all the compromises and extra code.

Only 5 of the 111 airline booking sites in our benchmark pass Core Web Vitals on mobile. That’s a 95% fail rate. @benschwarz.bsky.social ran the full analysis in the report below See where every airline ranks: calibreapp.com/tools/website-speed-leaderboard/airline-booking

🏆 Website speed industry benchmarks, now with fresh CrUX data for August calibreapp.com/tools/websit...

New in Real User Monitoring: See how each website deployment affects performance with automatic chart annotations and per-deploy breakdown that shows how each release compares to the last. calibreapp.com/changelog/ar...

Run a Single Page App? Calibre RUM now automatically tracks Core Web Vitals in your SPA, giving a much deeper look into user-experience. calibreapp.com/changelog/ar...

Now when you add a new Site to Calibre, it crawls your site to find important pages, collects from Google’s CrUX dataset, and runs Synthetic tests. Type one URL, get a full side-wide appraisal of performance and user-experience. Read about it in the changelog 👇 calibreapp.com/changelog/ar...

SAML SSO is now on the Team plan. Secure, controlled sign-in for more teams, with automatic SCIM deprovisioning. calibreapp.com/changelog/ar...

Not performance, but still important: 🏢 Companies can use Audit logging to keep a record of administrative actions for compliance and security. Read all about it on the changelog 👇 calibreapp.com/changelog/ar...

Calibre’s CrUX monitoring took a mighty leap forward this week — there’s an all new Global Audience report to show UX quality over time, and more detailed tracking to help you pinpoint performance issues. Read all about it 👇 calibreapp.com/changelog/ar...

🆕 Our free Core Web Vitals tool, now with UX Rating and beautiful global performance maps that show the whole picture Read what's new: calibreapp.com/changelog/ar...

🆕 New free tool from Calibre — Compare Website Speed. Rank up to 5 sites side-by-side on real Chrome user data from Google’s CrUX dataset. See who leads on Core Web Vitals, where each site falls short, and how rankings shift over time. calibreapp.com/tools/compar...

Calibre CLI 7.0 is out 🚀 New commands to access real user performance data: • calibre rum — live visitors, Web Vitals, UX ratings • calibre crux — Chrome User Experience Report data • calibre synthetic — reorganised synthetic commands and more! see: calibreapp.com/changelog/ar...

We will never get tired of customers telling us they found bugs nobody else could see. Thanks for the kind words Riccardo!

How we use Playwright to generate 585+ screenshots across every theme and viewport — and how it became our design QA process. calibreapp.com/blog/screenshot-pipeline-qa-review

How many of your users are having a good time on your site right now? UX Rating grades end-to-end real user sessions, not just pageviews. New post on why Good% is the number worth watching: calibreapp.com/blog/ux-rating

A world map in 10kb. How Calibre’s new UX Rating hexagon map came to life. calibreapp.com/blog/buildin...

New: Synthetic page-level audits now include browser Baseline status. This new Baseline audit details browser support for web platform features, classifying technologies as Limited Availability, Newly Available, or Widely Available. Learn more on the changelog: calibreapp.com/changelog/ar...

I wanted to call out some tools from the community this month. First up, @calibreapp.com have a Web Site Leaderboard of key areas: calibreapp.com/tools/websit... Similar to the Core Web Vitals Tech report it uses HTTP Archive data but then groups it by industry. 4/9

Website Speed Leaderboard, updated today: 💐 Fresh data from March 26' 🏛️ New report: Australian Government 🎓 New report: Australian Universities calibreapp.com/tools/website-speed-leaderboard

Calibre’s synthetic testing is currently unavailable in the Bahrain location due to ongoing conflict as a result of the illegal war instigated by the United States. www.calibrestatus.com/incidents/q1...

💖 Website Speed Leaderboards now include core technology data! Alongside rankings, you’ll see sites with their web framework or platform. Now it's even easier to see what technologies are used on the world's biggest websites, and how they perform. 👉 calibreapp.com/tools/websit...

Hello, RUM calibreapp.com/blog/real-user-monitoring

Cookin up some sweet stuff @calibreapp.com at the moment, can’t wait to share it 🔜

Shoutout to @developer.chrome.com for CrUX API speed and reliability 🙌. We’re handling millions of requests monthly, with **99th percentile latency under 300ms** and high availability. This performance at scale is crucial for building a reliable product. Huge props to the CrUX team 👏.

🥉 What do Red Bull Racing, Kroger, BBC UK & Crystal Palace FC all share in common? All of them hit #3 in their category for the world’s fastest websites for January 26' See how the rankings shook out calibreapp.com/tools/websit...

🆕 Calibre now spiders your Site and collects Google Chrome User Experience Report data for all your pages! Zero config & no manual checks. Metrics for all your most important pages. calibreapp.com/changelog/ar...

☻ Hello