@mmocny.com - I can't seem to text you here somehow but it was super fun hanging out with you today and I hope you have a safe trip back ☺️👋🏻

@rich-harris.dev might have the best demo app I have ever seen 😁 at #perfNow

Here are mine! Thanks for a wonderful conference 🫶🏻 bit.ly/a11y-perfnow25

If you are looking for the slides from my PerfNow 2025 talk, Web Performance Allies, they are at speakerdeck.com/ethangardner...

Super talk from @tunetheweb.com on Speculation Rules. Been nervous about using them for fear of false positives on things like Google Analytics. The upcoming prerender_until_script logic sounds like exactly what I need - you'll benefit from fetching subresources, but won't execute scripts. #PerfNow

Halloween at #perfnow, pirates and vampires. A.k.a sword fight, the sequel. Or... How RUMvision slayed Akamai😇😆 (jk)

I appreciate everyone at #perfnow letting me have my "old man yells at cloud" moment this morning. Slides are now up: noti.st/tkadlec/3imH...

For those who just watched @tunetheweb.com 's presentation, this is the SPDY STREAM he just posted about w/ @yoav.ws + @krzksz.bsky.social of Shopify. Thank again Barry! #perfNow 🎥 youtu.be/DHgoULxvuJ8

Do you have React Server Components? Have you used <Suspense> correctly? Fascinating investigations into rendering 🕵🏻‍♀️ by @adevnadia.bsky.social at #perfNow

📌 A few year ago, I dared to say that React was the new WordPress. What did I mean?? Devs have for the most part adopted the platform just because. That show of hands during this Nadia Makarevich's talk is proof of it. Orgs hire for React devs often. Wild times. #perfNow

For #PerfNow folks (and other folks who are interested in front-end #webperf)… you should know that @adevnadia.bsky.social has written this amazing resource. www.getwebperf.com

@adevnadia.bsky.social is not afraid to shout from the stage why she loves SPAs (while acknowledging their drawbacks) and on behalf of all FE devs, I would like to thank her for her bravery 🫡🙏🏻 #perfNow

One of the newest job descriptions "vibe coding cleanup specialist" techcrunch.com/2025/09/14/v... #perfnow

@mmocny.com doing an excellent job of visually explaining how interactions are measured between an MPA and a SPA. #perfnow

@programmingart.bsky.social and I are on the same page for a lot of things but I'm still learning from the master on how much drip a Halloween costume should have #perfNow

@mmocny.com is in the right place because yes, #perfNow is the place which thinks measuring user interaction accurately is suuper cool 😎

Huge thanks to @andydavies.me for mentioning the LoAF Helpers WebPerf Snippet at @perfnow.nl! Honored to be part of the amazing Web Performance community 🫶 🔗 webperf-snippets.nucliweb.net/Interaction/... #WebPerf #PerfNow #Performance #LoAF #INP #CoreWebVitals

Fellow #perfnow fellows, a reminder that PerfPlanet calendar is coming this December for another edition. And it needs YOU. Please ask if you have any contribution ideas or concerns calendar.perfplanet.com/contribute/

@andydavies.me has the receipts to call out how 1st party scripts (NextJS) usage really mess with performance in a real world example at #perfNow

Be aware of "survivor bias" in your metrics. Users having a fast experience will view more pages and have longer sessions. Your RUM data is always inherently biased towards those with fast experiences. @andydavies.me #PerfNow #webperf

Learn more about Total Blocking Duration (TBD), the experimental new metric that @andydavies.me is pioneering. #PerfNow www.speedcurve.com/blog/long-an...

In my opinion, any SWE writing client-side JavaScript has a responsibility to understand the Event Loop. @jakearchibald.com’s ‘In The Loop’ talk is required watching: www.youtube.com/watch?v=cCOL... (cited by @andydavies.me at #perfnow)

"People with faster experiences do more... the web is biased towards people with faster experiences" - @andydavies.me at #perfNow

Day 2 at #perfnow I'm going to continue to add notes to my blog through the day stuart-mcmillan.com/blog/webperf...

“We are the user’s line of defence” between automated tools that don’t offer accountability. @tkadlec.bsky.social at #PerfNow

For #PerfNow folks who want to go even deeper on Long Animation Frames, @andydavies.me wrote the definitive guide. www.speedcurve.com/blog/guide-l...

@andydavies.me explaining LoAFs (Long Animation Frames) in the context of a page lifecycle - "Normally atleast 1 before FCP" at #perfNow

We’re shipping more and more and more JavaScript. And the problem is only going to get worse as most AI-generated web pages are built on JS frameworks. @speedcurve.com performance expert @andydavies.me at #PerfNow

WOW, @tkadlec.bsky.social totally exposes how lopsided the equation with AI crawlers is right now at #perfNow

Sharing raw metrics with stakeholders isn’t enough. Instead, share clear problem statements. @ethangardner.com at #PerfNow

@ethangardner.com shares some harsh real user feedback about slow sites that we can use to show non-performance folks why site speed matters. #PerfNow

Be the interpreter for your non-technical stakeholders. Milliseconds don't mean much to most people, make the data relatable. "Now they get a smoother experience that's over 50% faster." @ethangardner.com on making performance allies. #PerfNow #webperf

Glad to announce that my team at @cloudflare.social released a 1.0.0 version of a cross-browser web performance testing agent that supports Chrome, Firefox, Safari and Edge. Thank you to @tkadlec.bsky.social for making it happen and writing most of the code so far! github.com/cloudflare/t...

You've heard about colouring books... But have you heard about a ˗ˏˋ CSS colouring book!? ˎˊ˗ Introducing the @nordcraft.com CSS colouring book today! Get out your CSS pencils and get colouring! 😃 nordcraft.com/coloring-book

Loving @ethangardner.com’s talk about making #webperf allies! Totally agree that competitive benchmarking can get marketing folks excited about performance Fun fact: you can do that with @speedcurve.com! #PerfNow support.speedcurve.com/docs/competi...

@ethangardner.com is an absolute riot while giving sage advice at #perfNow

If Umar Hansa's talk was an album, I would describe it as all hits no skips because my god, it's so packed to the brim with little tips and tricks to improve the way you diagnose and deal with perf problems. I can't stop taking screenshots! #perfNow

The #webperf industry has settled on P75 as our benchmark. P75 isn't very ambitious. "It's fine for 25% of our customers to have a bad experience, we don't mind." Why not aim for p95? @csswizardry.com #PerfNow

And last (but definitely not least) here’s @cliffcrocker.bsky.social’s super-interesting analysis of INP and its correlation with UX and business metrics. #PerfNow www.speedcurve.com/blog/INP-use...

“What happens when you want to center a div in Chrome?” — @michael-hladky.bsky.social at #perfnow This would make a great interview question that would give a variety of different answers. #webperf

@marcysutton.com “Go forth and improve access” presentation has a great tool list #perfnow

Respect user preferences. Years ago I published conditionerjs.com to help you conditionally load JavaScript modules based on the current user context and preferences. Great DX if you’re into sprinkling a little bit of JS on top of your pages. #perfnow

"If you didn't have a dark mode, you didn't get my business. And nursing moms shop a lot!" - @inesakrap.bsky.social being so real at #perfNow

One more reason to work on web perf! 😎 @inesakrap.bsky.social at #perfNow

TIL - It's better for the environment to use less JS, as if I needed one more reason 😬 @inesakrap.bsky.social at #perfNow

“As performance-minded technologists, you are in a position to do something about accessibility.” — @marcysutton.com at #PerfNow marcysutton.com/accessibilit...

Slides from my @perfnow.nl talk — How Fast Is Fast Enough? — are up! If you’re at #PerfNow (or even if you’re not) I’d love to talk about creating a delightful experience for your users. speakerdeck.com/tammyeverts/...

Sharing a few of the sources I cited during my #PerfNow talk, I’ll start with this one… Here’s a deeper dive into how to create correlation charts that help you see the relationship between performance metrics and business/engagement metrics. www.speedcurve.com/blog/site-sp...

Another source from my #PerfNow talk… Here’s why you need to know the performance plateau for your site. www.speedcurve.com/blog/web-per...