Ever wanted a comprehensive guide to DevTools and debugging front ends? Check out this ebook that Lala Hakobyan just launched: github.com/lala-hakobya... I’m impressed!!

GitHub - lala-hakobyan/front-end-debugging-handbook: A comprehensive guide to debugging tools for modern, complex front-end applications. This handbook provides practical, real-world guidance on a com...

A comprehensive guide to debugging tools for modern, complex front-end applications. This handbook provides practical, real-world guidance on a complete suite of tools, from Chrome DevTools and fra...

github.com

Interested in the @httparchive.org and not sure where to start? During the @performanceobserver.dev meetup tomorrow (12:30pm ET), I'm going to be providing an overview of the HTTP Archive and demonstrate how to start querying it! performanceobserver.dev/events/episo...

Querying the HTTP Archive and finding your Performance Plateau | PerformanceObserver

In this episode, Paul Calvano dives deep into querying the HTTP Archive dataset to uncover web trends, while Tammy Everts breaks down the "Performance Plateau", explaining why identifying your specifi...

performanceobserver.dev

Estela Franco@guaca.bsky.social · 6mo ago

Save the date! 🤩 The next @performanceobserver.dev will be on February 26 at 6:30 PM CET (12:30 PM ET / 9:30 AM PT) All the details and "add to calendar" links in performanceobserver.dev

I’ll be giving a talk about Fonts and Web Perfomance at the Tech SEO Summit in Hamburg, Germany on April 23rd. They have only a few tickets remaining if anyone wants to attend! tech-seo-summit.com

A shocking 8.5% of sites that use CDNs deliver some static content directly to end users via cloud storage! Many are not compressing or caching this content either. This comes at a significant performance cost. Details, examples and @httparchive.org stats here - paulcalvano.com/2026-02-09-s...

Tomorrow at 6pm the @nywebperf.com meetup is running another in person "Meet for Speed" session. We take requests from attendees for sites to do a webperf analysis on. @fastly.com is hosting us at their office in Union Square. Have a site you'd like us to analyze? bit.ly/meet4speed-s...

NY Web Performance@nywebperf.com · 7mo ago

Join us for a Meet4SPEED session THIS THURSDAY, Jan 22 @ 6PM, in the @fastly.com Manhattan office. Learn how to optimize sites with us! RSVP: www.meetup.com/web-performa... Have a site you'd like analyzed? Submit here: bit.ly/meet4speed-s... #webperformance #wpo #meetup #nyc

The 2025 Web Almanac by HTTP Archive has been officially released! 🚀 We would like to thank all of our contributors from around the globe who made this extensive report possible! Check out the full report here: almanac.httparchive.org

My contribution to this years Web Performance Calendar is all about Third Parties and Single Points of Failure (SPOF). Based on @httparchive.org data I found that 67% of websites have at least 1 render blocking third party - and quite a few of them are SPOF risks!

Stoyan Stefanov @stoyan.me · 8mo ago

Web Performance Calendar day 29 with @paulcalvano.bsky.social's research on 3rd parties, SPOF, and the need to test and monitor these. 67% of sites out there have at least 1 render-blocking external dependency. calendar.perfplanet.com/2025/third-p...

New @httparchive.org analysis about sites adding AI Bots and Crawlers to their robots.txt files. While robots.txt doesn't "block" bots by itself, it's a clear demonstration of the preferences of site owners and the sentiment towards AI crawlers on today's web. paulcalvano.com/2025-08-21-a...

This Thursday at 6pm the NYC WebPerf Meetup is running another in person "Meet for Speed" session. We'll be taking requests from attendees for sites to do a web performance analysis on. www.meetup.com/web-performa... Have a site you'd like us to analyze? Add it here - bit.ly/meet4speed-s...

[In-person] Meet for SPEED, Thu, Jul 24, 2025, 6:00 PM | Meetup

Join up for an opportunity to work together on optimizing our sites. Have a site you'd like us to analyze? Add it here - [https://bit.ly/meet4speed-submit](https://bit.ly/

meetup.com

Tonight at 6pm the NYC WebPerf Meetup is running another in person "Meet for Speed" session. We'll be taking requests from attendees for sites to do a web performance analysis on. Fastly will be hosting us at their NYC office. www.meetup.com/web-performa...

[In-person] Meet for SPEED, Thu, Dec 19, 2024, 6:00 PM | Meetup

Join up for an opportunity to work together on optimizing our sites. Have a site you'd like us to analyze? Add it here - [https://bit.ly/meet4speed-submit](https://bit.ly/

meetup.com

The video of my talk from the Performance Now conference in Amsterdam was posted today. #perfnow

performance.now() conference@perfnow.nl · 2y ago

The next #perfnow video is up: @paulcalvano.bsky.social with Performance Mistakes. www.youtube.com/watch?v=j5E_...

This Friday afternoon I'll be at the Boston Web Performance meetup giving my talk on "Performance Mistakes". If you are in the Boston area and interested in web performance, join us! www.meetup.com/boston-web-p...

Performance Mistakes, Fri, Dec 6, 2024, 4:30 PM | Meetup

December's meetup will feature Paul Calvano, on his return from the PerfNow conference in Amsterdam. **Agenda** * 4:30 pm: Arrive & networking * 5:00 pm: Talk starts * 5:

meetup.com

If you missed @paulcalvano.bsky.social at @perfnow.bsky.social, and happen to be in the Boston area next week, he'll be speaking at the Boston Web Performance December meetup. Sign up on meetup: www.meetup.com/boston-web-p... December 6th ∘ 4:30pm ∘ Akamai HQ in Cambridge. #webperf #perfmatters

Performance Mistakes, Fri, Dec 6, 2024, 4:30 PM | Meetup

December's meetup will feature Paul Calvano, on his return from the PerfNow conference in Amsterdam. **Agenda** * 4:30 pm: Arrive & networking * 5:00 pm: Talk starts * 5:

meetup.com

Last week I gave a talk at the #PerfNow conference titled “Performance Mistakes”. I started off explaining a bit about Etsy’s blameless culture, and how it’s ok to make mistakes. Then I shared 17 common #webperf mistakes using @httparchive.org data, with examples. www.slideshare.net/slideshow/pe...

Performance Now '24- Performance Mistakes - Final.pdf

Performance Now '24- Performance Mistakes - Final.pdf - Download as a PDF or view online for free

slideshare.net

Great start to #perfnow this year with @tammyeverts.bsky.social and @csswizardry.com ! For those of you looking for the general web perf starter pack, here it is! Lots of new folks since last time I shared it go.bsky.app/RVWSVqe

The all new performance chapter of the 2024 Web Almanac written by Jevgenija Zigisova and @inesakrap.bsky.social almanac.httparchive.org/en/2024/perf...

Performance | 2024 | The Web Almanac by HTTP Archive

Performance chapter of the 2024 Web Almanac covering Core Web Vitals, with deep dives into the Largest Contentful Paint, Cumulative Layout Shift, and Interaction to Next Paint metrics and their diagno...

almanac.httparchive.org

Fellow #perfnow attendee, the PerfPlanet advent calendar is looking for articles for the 2024 edition. Please come talk to me if you’re considering an idea for a post but you’re not sure and you need a second opinion calendar.perfplanet.com/contribute/

Contribute

Passionate about a topic? Working on a new tool? Have a technique you want to teach? Research you've done? Tell the web performance community! Send your articles to ssttoo@ymail.com. Please include: ...

calendar.perfplanet.com

Took 2 mins at #PerfNow to talk about the RUM Community Group in W3C for anyone doing RUM. It's free and easy to join if you're interested! www.w3.org/community/ru...

Yesterday during my #perfnow talk, I mentioned the Web Performance Slack. If you’d like to join the Slack, use this link before Nov 25: join.slack.com/t/webperf…