Episode 5 | PerformanceObserver

YouTube

In a little over 24 hours I'll be presenting an introduction to diving into the web performance data in the Chrome User Experience Report (CrUX) and HTTP Archive related to how I built Theme Vitals. Come join us!

#webperf

https://performanceobserver.dev/

PerformanceObserver: A virtual web perf meetup

Join the PerformanceObserver virtual performance meetup to get all the latest web performance news and hang out with the community.

PerformanceObserver: A virtual web perf meetup

I was excited when @speedcurve.com reached out to me to build their #Shopify app - now it's easier to integrate full real-user performance data collection in Shopify storefronts and correlate that data with bounce rates and conversions.

Now you can see exactly how #webperf impacts your bottom line!

Tonight at 6:00PM @ Fastly: Performance on a Budget: Lessons from Building a Nonprofit SaaS Platform with Akshay Nair. See you all there: https://www.meetup.com/Web-Performance-NY/events/307096616 #webperf #nyc
Performance on a Budget: Lessons from Building a Nonprofit SaaS Platform, Tue, Jun 17, 2025, 6:00 PM | Meetup

What does it take to ship a production-ready platform on a tight budget, with a team of interns and freelancers, and still care about performance—both in code and in people

Meetup
⚡Featured posts this week:
✨ What’s new in Safari and WebKit: Saron Yitbarek
✨ How we’re adapting SEO for LLMs and AI search: Malte Ubl
✨ Optimized Fonts in Nuxt: Jakub Andrzejewski
✨ Why Chrome DevTools Isn’t Enough: Amila Welihinda
🙏 Special thanks to the authors!
#webperf
🎉 WebPerformance Report Week #24 is out! ✅
🔍 Ready for next Week? Don’t miss out!
⚡ Web Performance Report: 👉 https://webperformancereport.com/
🛡️ HTTP Security Report: 👉 https://webperformancereport.com/httpo/
#webperf #corewebvitals #ux #seo #cybersecurity #websecurity

Developing the twom database for Cyrus IMAP,
by Bron Gondwana at Fastmail (@fastmail).

"""
TIL: fcntl isn’t fair. Releasing the lock didn’t magically let a waiting writer proceed, the same process would often pick up the lock again without giving another process a chance. On busy files, writers could entirely starve.
"""

https://www.fastmail.com/blog/introducing-twom/

#perfmatters #webperf #fastmail #imap

Introducing the twom database format

We replaced the twoskip database format with something faster and better.

Fastmail
📈 Real user journey over 3 years.
They don’t check reports once. 💪🏼
Reports. Decisions. Results.
WebPerformance Report is a habit.
👉 Get your own report: https://webperformancereport.com
#webperf #ux #corewebvitals #seo
We checked the WebPerformance of Docker's website before Sunday’s delivery. Everything looks good!
Take a look at the report:
👉 https://webperformancereport.com/report/wpt/250613_ZiDc8N_819?utm_source=webperfreport&utm_medium=mastodon
#webperf #crux #corewebvitals #ux #seo #docker #tech
Web Performance Report 2025 | Week #24 | www.docker.com | 250613_ZiDc8N_819

Web performance report every week in your inbox.

One of the most fun parts of my job is compiling the monthly @speedcurve newsletter – which I just noticed has hit 16K subscribers!

The June edition comes out next week. You can sign up and check out the archive full of #webperf, #ux, and #seo goodness here: https://www.speedcurve.com/newsletter/

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