performance.now() conference
@perfnow.nl
A single track conference with fourteen world-class sessions covering today’s most important web performance insights. #perfnow
https://perfnow.nl
19th and 20th of November, Amsterdam
https://perfnow.nl
19th and 20th of November, Amsterdam
Pinned
performance.now() 2026 will take place on 19th and 20th of November 2026. #perfnow.
2025 conference photos are up
perfnow.nl/2025/pix/pho...
(though I need to consult a speculation rules expert at some point)
perfnow.nl/2025/pix/pho...
(though I need to consult a speculation rules expert at some point)
performance.now() 2025 photos
perfnow.nl
November 5, 2025 at 11:24 AM
2025 conference photos are up
perfnow.nl/2025/pix/pho...
(though I need to consult a speculation rules expert at some point)
perfnow.nl/2025/pix/pho...
(though I need to consult a speculation rules expert at some point)
And the performance.sync() videos, the Wednesday pre-party, are also live. www.youtube.com/@WebConferen...
Web Conferences Amsterdam
We curate and organise deep-diving, single-track, content-focused web conferences, in Amsterdam. Most sessions, about 45 minutes each, include a Q&A session with the speaker. We aim to cover technique...
www.youtube.com
November 5, 2025 at 10:59 AM
And the performance.sync() videos, the Wednesday pre-party, are also live. www.youtube.com/@WebConferen...
This was performance.now() 2025
YouTube video by Web Conferences Amsterdam
www.youtube.com
November 4, 2025 at 11:51 AM
Reposted by performance.now() conference
Reposted by performance.now() conference
I shilled a javascript framework at a web perf conference and came out mostly unscathed, AMA
November 1, 2025 at 8:45 AM
I shilled a javascript framework at a web perf conference and came out mostly unscathed, AMA
performance.now() 2026 will take place on 19th and 20th of November 2026. #perfnow.
November 1, 2025 at 8:21 AM
performance.now() 2026 will take place on 19th and 20th of November 2026. #perfnow.
Reposted by performance.now() conference
Unsurprising revelation from #perfnow:
@rich-harris.dev really is ruddy good at demonstrating interesting concepts.
His @svelte.dev is demo is terribly compelling.
@rich-harris.dev really is ruddy good at demonstrating interesting concepts.
His @svelte.dev is demo is terribly compelling.
October 31, 2025 at 4:44 PM
Unsurprising revelation from #perfnow:
@rich-harris.dev really is ruddy good at demonstrating interesting concepts.
His @svelte.dev is demo is terribly compelling.
@rich-harris.dev really is ruddy good at demonstrating interesting concepts.
His @svelte.dev is demo is terribly compelling.
Reposted by performance.now() conference
October 31, 2025 at 4:43 PM
Reposted by performance.now() conference
@rich-harris.dev might have the best demo app I have ever seen 😁 at #perfNow
October 31, 2025 at 4:41 PM
@rich-harris.dev might have the best demo app I have ever seen 😁 at #perfNow
Reposted by performance.now() conference
October 31, 2025 at 4:32 PM
Reposted by performance.now() conference
#perfnow absolutely fantastic and compelling demos from @rich-harris.dev but I'm trying to resist concerns on his preference for tabs over spaces...😂
October 31, 2025 at 4:47 PM
#perfnow absolutely fantastic and compelling demos from @rich-harris.dev but I'm trying to resist concerns on his preference for tabs over spaces...😂
Reposted by performance.now() conference
@perfnow.nl for whoever asked that question about Sec-Purpose it DOES get set on sub-resources for prerendered speculations. Not just the document. #perfnow
October 31, 2025 at 3:16 PM
@perfnow.nl for whoever asked that question about Sec-Purpose it DOES get set on sub-resources for prerendered speculations. Not just the document. #perfnow
Reposted by performance.now() conference
It’s an honor to see my company #speedkit mentioned on stage at #perfnow by a web performance VIP and ambassador such as Barry @tunetheweb.com Pollard. 😊 Congrats to the Speed Kit team who implemented speculation rules in such an effective way in our product!
October 31, 2025 at 3:20 PM
It’s an honor to see my company #speedkit mentioned on stage at #perfnow by a web performance VIP and ambassador such as Barry @tunetheweb.com Pollard. 😊 Congrats to the Speed Kit team who implemented speculation rules in such an effective way in our product!
Reposted by performance.now() conference
Making Sense of Long Animation Frames…
The slides from my #PerfNow talk are available on Notist
noti.st/andydavies/9...
The slides from my #PerfNow talk are available on Notist
noti.st/andydavies/9...
Making Sense of LoAF by Andy Davies
Over time the web has become more reliant on JavaScript… but we’ve very little information on how its growth is affecting our visitors’ experience.
noti.st
October 31, 2025 at 4:23 PM
Making Sense of Long Animation Frames…
The slides from my #PerfNow talk are available on Notist
noti.st/andydavies/9...
The slides from my #PerfNow talk are available on Notist
noti.st/andydavies/9...
Reposted by performance.now() conference
Here are mine: 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
October 31, 2025 at 3:16 PM
Here are mine: speakerdeck.com/ethangardner...
Reposted by performance.now() conference
Reposted by performance.now() conference
Interesting! Etsy implemented speculation rules and got these results:
👍 Time to First Byte on the listing page improved 23.6%
👍 First Contentful Paint improved 20.7%
👍 Largest Contentful Paint improved 21.1%
👍 DOMContentLoaded improved 20.4%
#PerfNow #webperf
www.etsy.com/codeascraft/...
👍 Time to First Byte on the listing page improved 23.6%
👍 First Contentful Paint improved 20.7%
👍 Largest Contentful Paint improved 21.1%
👍 DOMContentLoaded improved 20.4%
#PerfNow #webperf
www.etsy.com/codeascraft/...
www.etsy.com
October 31, 2025 at 2:32 PM
Interesting! Etsy implemented speculation rules and got these results:
👍 Time to First Byte on the listing page improved 23.6%
👍 First Contentful Paint improved 20.7%
👍 Largest Contentful Paint improved 21.1%
👍 DOMContentLoaded improved 20.4%
#PerfNow #webperf
www.etsy.com/codeascraft/...
👍 Time to First Byte on the listing page improved 23.6%
👍 First Contentful Paint improved 20.7%
👍 Largest Contentful Paint improved 21.1%
👍 DOMContentLoaded improved 20.4%
#PerfNow #webperf
www.etsy.com/codeascraft/...
Reposted by performance.now() conference
#PerfNow has incredibly interesting talks. Anyone who's serious about performance should join.
Proud that we at @framer.com are sponsors.
Proud that we at @framer.com are sponsors.
October 31, 2025 at 3:01 PM
#PerfNow has incredibly interesting talks. Anyone who's serious about performance should join.
Proud that we at @framer.com are sponsors.
Proud that we at @framer.com are sponsors.
Reposted by performance.now() conference
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
October 31, 2025 at 2:35 PM
Here are mine! Thanks for a wonderful conference 🫶🏻 bit.ly/a11y-perfnow25
Reposted by performance.now() conference
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
#PerfNow
October 31, 2025 at 2:27 PM
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
#PerfNow
@marcysutton.com @mmocny.com @andydavies.me @ethangardner.com @inesakrap.bsky.social @csswizardry.com @michael-hladky.bsky.social @adevnadia.bsky.social
Could you please post a link to your conference slides so we can share it with our audience? Thanks!
Could you please post a link to your conference slides so we can share it with our audience? Thanks!
October 31, 2025 at 2:15 PM
@marcysutton.com @mmocny.com @andydavies.me @ethangardner.com @inesakrap.bsky.social @csswizardry.com @michael-hladky.bsky.social @adevnadia.bsky.social
Could you please post a link to your conference slides so we can share it with our audience? Thanks!
Could you please post a link to your conference slides so we can share it with our audience? Thanks!
Reposted by performance.now() conference
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...
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
October 31, 2025 at 1:57 PM
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...
Slides are now up: noti.st/tkadlec/3imH...
Reposted by performance.now() conference
There's a sight to see, freshly published in time for #PerfNow. Talk by @tunetheweb.com , an excellent walkthrough on how to get the most out of a truly powerful tool
www.etsy.com/codeascraft/...
www.etsy.com/codeascraft/...
October 31, 2025 at 2:06 PM
There's a sight to see, freshly published in time for #PerfNow. Talk by @tunetheweb.com , an excellent walkthrough on how to get the most out of a truly powerful tool
www.etsy.com/codeascraft/...
www.etsy.com/codeascraft/...