@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 ☺️👋🏻
Here are mine! Thanks for a wonderful conference 🫶🏻 bit.ly/a11y-perfnow25
Accessibility & Performance - perfNow 2025 - Marcy Sutton Todd
Accessibility & Performance performance.now() 2025 By Marcy Sutton Todd - Senior Engineer, Frontend Infrastructure at Khan Academy Hi, PerfNow! I'm here to talk to you about the intersection of access...
bit.ly
If you are looking for the slides from my PerfNow 2025 talk, Web Performance Allies, they are at speakerdeck.com/ethangardner...
Web Performance Allies - PerfNow 2025
Image credits: https://commons.wikimedia.org/wiki/File:TAR_Detour_clue.png https://commons.wikimedia.org/wiki/File:Carach_Angren_M%C3%A9an_22_08_200…
speakerdeck.com
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...
Stubborn Empathy by Tim Kadlec
One of the most important roles we play on the web is as the users line of defense, which requires that we demonstrate stubborn empathy on their behalf. Unfortunately, that concept is all too easy to ...
noti.st
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
Web Performance Fundamentals
A Frontend Developer’s Guide to Profile and Optimize React Web Apps
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
Vibe coding has turned senior devs into ‘AI babysitters,’ but they say it’s worth it | TechCrunch
TechCrunch spoke to experienced coders about their time using AI-generated code about what they see as the future of vibe coding.
techcrunch.com
@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/
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
@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...
SpeedCurve | NEW! Monitor Long Animation Frames and get to the bottom of your JavaScript issues
Now you can monitor Long Animation Frames (LoAFs) and fix the third parties and other scripts that are hurting your user experience!
speedcurve.com
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...
Notes from Performance.now 2025 conference | Stuart McMillan
My fifth year at Performance.now conference, the world's best #webperformance conference
stuart-mcmillan.com
“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...
SpeedCurve | The Definitive Guide to Long Animation Frames (LoAF)
LoAF lets you identify problem scripts, quantify the impact of third-party scripts, and improve the user experience. Here's everything you need to know to get started.
speedcurve.com
@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
