PerformanceObserver
@performanceobserver.dev
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We're live with our own account now! Follow us for our web performance meetup-related announcements!
- New events
- New video uploads
- Related events
#webperf
We're live with our own account now! Follow us for our web performance meetup-related announcements!
- New events
- New video uploads
- Related events
#webperf
Episode 8 is next week on Nov 19! Come join us live for access to Q&A and general chat!
We have @aarontgrogg.bsky.social talking about reducing JS workload and @mattzeunert.com walking through synthetic testing with DebugBear! #webperf
All details and add-to-calendar at performanceobserver.dev
We have @aarontgrogg.bsky.social talking about reducing JS workload and @mattzeunert.com walking through synthetic testing with DebugBear! #webperf
All details and add-to-calendar at 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.dev
November 10, 2025 at 6:49 PM
Episode 8 is next week on Nov 19! Come join us live for access to Q&A and general chat!
We have @aarontgrogg.bsky.social talking about reducing JS workload and @mattzeunert.com walking through synthetic testing with DebugBear! #webperf
All details and add-to-calendar at performanceobserver.dev
We have @aarontgrogg.bsky.social talking about reducing JS workload and @mattzeunert.com walking through synthetic testing with DebugBear! #webperf
All details and add-to-calendar at performanceobserver.dev
Reposted by PerformanceObserver
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 [email protected]. Please include:
...
calendar.perfplanet.com
October 30, 2025 at 4:59 PM
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/
Stoyan's video from his talk about fonts and layout shifts is now live!
cc @stoyan.me
#webperf
www.youtube.com/watch?v=WaY8...
cc @stoyan.me
#webperf
www.youtube.com/watch?v=WaY8...
Fabulous fallbacks and further font fantasmagoria with Stoyan Stefanov | PerformanceObserver
YouTube video by PerformanceObserver
www.youtube.com
October 24, 2025 at 5:11 PM
Stoyan's video from his talk about fonts and layout shifts is now live!
cc @stoyan.me
#webperf
www.youtube.com/watch?v=WaY8...
cc @stoyan.me
#webperf
www.youtube.com/watch?v=WaY8...
Join is in approx 74 minutes! @stoyan.me will talk about fonts then we'll probably do some live optimization which will not be recorded
#webperf
performanceobserver.dev/events/episo...
#webperf
performanceobserver.dev/events/episo...
Ep. 7: Font fallbacks and layout shift | PerformanceObserver
In this episode, we have Stoyan walking us through font fallbacks and optimizing layout shift.
performanceobserver.dev
October 23, 2025 at 2:46 PM
Join is in approx 74 minutes! @stoyan.me will talk about fonts then we'll probably do some live optimization which will not be recorded
#webperf
performanceobserver.dev/events/episo...
#webperf
performanceobserver.dev/events/episo...
Episode 7 is next week on Oct 23! Come join us live for access to Q&A and general chat!
We have @stoyan.me talking about font fallbacks and layout shift plus some extra time for an open discussion!
All details and add-to-calendar at performanceobserver.dev
We have @stoyan.me talking about font fallbacks and layout shift plus some extra time for an open discussion!
All details and add-to-calendar at 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.dev
October 14, 2025 at 7:04 PM
Episode 7 is next week on Oct 23! Come join us live for access to Q&A and general chat!
We have @stoyan.me talking about font fallbacks and layout shift plus some extra time for an open discussion!
All details and add-to-calendar at performanceobserver.dev
We have @stoyan.me talking about font fallbacks and layout shift plus some extra time for an open discussion!
All details and add-to-calendar at performanceobserver.dev
The videos from our last meetup are now live!
In this episode, Tim Vereecke introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcome third-party challenges in large enterprises using Partytown.
www.youtube.com/playlist?lis...
In this episode, Tim Vereecke introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcome third-party challenges in large enterprises using Partytown.
www.youtube.com/playlist?lis...
Episode 6 | PerformanceObserver - YouTube
In this episode, Tim Vereecke introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcom...
www.youtube.com
September 18, 2025 at 4:12 PM
The videos from our last meetup are now live!
In this episode, Tim Vereecke introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcome third-party challenges in large enterprises using Partytown.
www.youtube.com/playlist?lis...
In this episode, Tim Vereecke introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcome third-party challenges in large enterprises using Partytown.
www.youtube.com/playlist?lis...
Reposted by PerformanceObserver
Hey folks, I'm looking to schedule the next PerformanceObserver meetup and need some new CFP submissions.
I have a few experienced #webperf speakers on there, but I like to break it up with either newer speakers or new-to-webperf speakers.
performanceobserver.dev/call-for-pap...
I have a few experienced #webperf speakers on there, but I like to break it up with either newer speakers or new-to-webperf speakers.
performanceobserver.dev/call-for-pap...
Call for speakers | PerformanceObserver
Come speak at the PerformanceObserver virtual performance meetup! Speakers of all experience levels welcome.
performanceobserver.dev
September 4, 2025 at 6:57 PM
Hey folks, I'm looking to schedule the next PerformanceObserver meetup and need some new CFP submissions.
I have a few experienced #webperf speakers on there, but I like to break it up with either newer speakers or new-to-webperf speakers.
performanceobserver.dev/call-for-pap...
I have a few experienced #webperf speakers on there, but I like to break it up with either newer speakers or new-to-webperf speakers.
performanceobserver.dev/call-for-pap...
Episode 6 will be September 16!
In this episode, @timvereecke.bsky.social introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcome third-party challenges in large enterprises using Partytown.
#webperf
performanceobserver.dev
In this episode, @timvereecke.bsky.social introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcome third-party challenges in large enterprises using Partytown.
#webperf
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.dev
September 4, 2025 at 3:31 PM
Episode 6 will be September 16!
In this episode, @timvereecke.bsky.social introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcome third-party challenges in large enterprises using Partytown.
#webperf
performanceobserver.dev
In this episode, @timvereecke.bsky.social introduces us to UNO, the missing link in any TTFB analysis. Then, Julian Jandl walks us through a case study on how to overcome third-party challenges in large enterprises using Partytown.
#webperf
performanceobserver.dev
We're live in 1 hour!
In this episode we have Amrik Malhans walking us through the critical rendering path, and @sia.codes introducing us to using the public web performance data sets of HTTP Archive and CrUX.
performanceobserver.dev
In this episode we have Amrik Malhans walking us through the critical rendering path, and @sia.codes introducing us to using the public web performance data sets of HTTP Archive and CrUX.
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.dev
June 18, 2025 at 2:59 PM
We're live in 1 hour!
In this episode we have Amrik Malhans walking us through the critical rendering path, and @sia.codes introducing us to using the public web performance data sets of HTTP Archive and CrUX.
performanceobserver.dev
In this episode we have Amrik Malhans walking us through the critical rendering path, and @sia.codes introducing us to using the public web performance data sets of HTTP Archive and CrUX.
performanceobserver.dev
Just a little over 24 hours away! Come join us!
Ep. 4 will be on June 18!
We will have Amrik Malhans walking us through the critical rendering path, and Sia Karamalegos introducing us to using the public web performance data sets of HTTP Archive and CrUX. #webperf
All details and sign up at performanceobserver.dev
We will have Amrik Malhans walking us through the critical rendering path, and Sia Karamalegos introducing us to using the public web performance data sets of HTTP Archive and CrUX. #webperf
All details and sign up at 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.dev
June 17, 2025 at 2:28 PM
Just a little over 24 hours away! Come join us!
Ep. 4 will be on June 18!
We will have Amrik Malhans walking us through the critical rendering path, and Sia Karamalegos introducing us to using the public web performance data sets of HTTP Archive and CrUX. #webperf
All details and sign up at performanceobserver.dev
We will have Amrik Malhans walking us through the critical rendering path, and Sia Karamalegos introducing us to using the public web performance data sets of HTTP Archive and CrUX. #webperf
All details and sign up at 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.dev
June 4, 2025 at 3:34 PM
Ep. 4 will be on June 18!
We will have Amrik Malhans walking us through the critical rendering path, and Sia Karamalegos introducing us to using the public web performance data sets of HTTP Archive and CrUX. #webperf
All details and sign up at performanceobserver.dev
We will have Amrik Malhans walking us through the critical rendering path, and Sia Karamalegos introducing us to using the public web performance data sets of HTTP Archive and CrUX. #webperf
All details and sign up at performanceobserver.dev
Reminder - this is tomorrow!
Ep. 3 will be on May 14!
We will have Medhat Dawoud walking us through the process of building fast websites for everyone, and Amila Welihinda explaining how to profile JavaScript in production. #webperf
Details at performanceobserver.dev
We will have Medhat Dawoud walking us through the process of building fast websites for everyone, and Amila Welihinda explaining how to profile JavaScript in production. #webperf
Details at 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.dev
May 13, 2025 at 2:25 PM
Reminder - this is tomorrow!
Ep. 3 will be on May 14!
We will have Medhat Dawoud walking us through the process of building fast websites for everyone, and Amila Welihinda explaining how to profile JavaScript in production. #webperf
Details at performanceobserver.dev
We will have Medhat Dawoud walking us through the process of building fast websites for everyone, and Amila Welihinda explaining how to profile JavaScript in production. #webperf
Details at 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.dev
April 30, 2025 at 2:41 PM
Ep. 3 will be on May 14!
We will have Medhat Dawoud walking us through the process of building fast websites for everyone, and Amila Welihinda explaining how to profile JavaScript in production. #webperf
Details at performanceobserver.dev
We will have Medhat Dawoud walking us through the process of building fast websites for everyone, and Amila Welihinda explaining how to profile JavaScript in production. #webperf
Details at performanceobserver.dev
The videos from our latest episode are up! Come catch a pair of great talks by @verlok.bsky.social and @ethangardner.com!
www.youtube.com/playlist?lis...
#webperf
www.youtube.com/playlist?lis...
#webperf
Episode 3 | PerformanceObserver - YouTube
In this episode we have Andrea Verlicchi walking us through some real-world case studies of optimizing INP, and Ethan Gardner will discuss how to make allies...
www.youtube.com
April 17, 2025 at 3:16 PM
The videos from our latest episode are up! Come catch a pair of great talks by @verlok.bsky.social and @ethangardner.com!
www.youtube.com/playlist?lis...
#webperf
www.youtube.com/playlist?lis...
#webperf
Reminder - PerformanceObserver is tomorrow! Take a break from the news and listen to @ethangardner.com and @verlok.bsky.social talk about #webperf
All details and add to calendar at
performanceobserver.dev
All details and add to calendar at
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.dev
April 15, 2025 at 1:34 PM
Reminder - PerformanceObserver is tomorrow! Take a break from the news and listen to @ethangardner.com and @verlok.bsky.social talk about #webperf
All details and add to calendar at
performanceobserver.dev
All details and add to calendar at
performanceobserver.dev
Reposted by PerformanceObserver
It was so much fun recording this talk! Thanks for having me @performanceobserver.dev !!
🎥 The videos from our last meetup are now live on our YouTube channel! Here's the playlist:
www.youtube.com/playlist?lis...
Big thanks to @keerthanak17.bsky.social and @webx.bsky.social for speaking! ❤️
#webperf
www.youtube.com/playlist?lis...
Big thanks to @keerthanak17.bsky.social and @webx.bsky.social for speaking! ❤️
#webperf
Episode 2 | PerformanceObserver - YouTube
www.youtube.com
March 20, 2025 at 8:27 PM
It was so much fun recording this talk! Thanks for having me @performanceobserver.dev !!
Hey folks, the next episode of PerformanceObserver is now scheduled for 16 April with @verlok.bsky.social and @ethangardner.com ! See all details at performanceobserver.dev including add to calendar links with the join instructions.
#webperf
#webperf
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.dev
March 27, 2025 at 12:49 PM
Hey folks, the next episode of PerformanceObserver is now scheduled for 16 April with @verlok.bsky.social and @ethangardner.com ! See all details at performanceobserver.dev including add to calendar links with the join instructions.
#webperf
#webperf
🎥 The videos from our last meetup are now live on our YouTube channel! Here's the playlist:
www.youtube.com/playlist?lis...
Big thanks to @keerthanak17.bsky.social and @webx.bsky.social for speaking! ❤️
#webperf
www.youtube.com/playlist?lis...
Big thanks to @keerthanak17.bsky.social and @webx.bsky.social for speaking! ❤️
#webperf
Episode 2 | PerformanceObserver - YouTube
www.youtube.com
March 20, 2025 at 2:59 PM
🎥 The videos from our last meetup are now live on our YouTube channel! Here's the playlist:
www.youtube.com/playlist?lis...
Big thanks to @keerthanak17.bsky.social and @webx.bsky.social for speaking! ❤️
#webperf
www.youtube.com/playlist?lis...
Big thanks to @keerthanak17.bsky.social and @webx.bsky.social for speaking! ❤️
#webperf
Hey folks, here’s your reminder that PerformanceObserver is back with our second episode tomorrow! @webx.bsky.social s and @keerthanak17.bsky.social will talk about LoAF and designing for bad performance. All details and add to calendar at performanceobserver.dev
#webperf
#webperf
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.dev
March 18, 2025 at 1:49 PM
Hey folks, here’s your reminder that PerformanceObserver is back with our second episode tomorrow! @webx.bsky.social s and @keerthanak17.bsky.social will talk about LoAF and designing for bad performance. All details and add to calendar at performanceobserver.dev
#webperf
#webperf
Reposted by PerformanceObserver
The @performanceobserver.dev virtual meetup is back for its 2nd episode!
We have @webx.bsky.social and @keerthanak17.bsky.social ready to guide us through another deep dive into #WebPerf
Join us live!
📅 March 19th - 6 PM CET (10 AM PT / 1 PM ET)
Details and add to calendar (with zoom link)👇
We have @webx.bsky.social and @keerthanak17.bsky.social ready to guide us through another deep dive into #WebPerf
Join us live!
📅 March 19th - 6 PM CET (10 AM PT / 1 PM ET)
Details and add to calendar (with zoom link)👇
Ep.2: Long Animation Frames API and designing websites for bad performance | PerformanceObserver
In our second meetup we have Vinicius Dallacqua explaining us how to utilize the new Long Animation Frames API to optimize your runtime performance and Keerthana Krishnan outlining ways to build…
performanceobserver.dev
March 3, 2025 at 9:00 AM
The @performanceobserver.dev virtual meetup is back for its 2nd episode!
We have @webx.bsky.social and @keerthanak17.bsky.social ready to guide us through another deep dive into #WebPerf
Join us live!
📅 March 19th - 6 PM CET (10 AM PT / 1 PM ET)
Details and add to calendar (with zoom link)👇
We have @webx.bsky.social and @keerthanak17.bsky.social ready to guide us through another deep dive into #WebPerf
Join us live!
📅 March 19th - 6 PM CET (10 AM PT / 1 PM ET)
Details and add to calendar (with zoom link)👇
Less than 2 hours away!
📣 Reminder!!
In 2 days, we have @toddhgardner.com and @inesakrap.bsky.social giving talks in our first meetup! For full details - check out our website (and add to calendar to get the join links)!
performanceobserver.dev
In 2 days, we have @toddhgardner.com and @inesakrap.bsky.social giving talks in our first meetup! For full details - check out our website (and add to calendar to get the join links)!
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.dev
February 13, 2025 at 3:16 PM
Less than 2 hours away!
📣 Reminder!!
In 2 days, we have @toddhgardner.com and @inesakrap.bsky.social giving talks in our first meetup! For full details - check out our website (and add to calendar to get the join links)!
performanceobserver.dev
In 2 days, we have @toddhgardner.com and @inesakrap.bsky.social giving talks in our first meetup! For full details - check out our website (and add to calendar to get the join links)!
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.dev
February 11, 2025 at 3:37 PM
📣 Reminder!!
In 2 days, we have @toddhgardner.com and @inesakrap.bsky.social giving talks in our first meetup! For full details - check out our website (and add to calendar to get the join links)!
performanceobserver.dev
In 2 days, we have @toddhgardner.com and @inesakrap.bsky.social giving talks in our first meetup! For full details - check out our website (and add to calendar to get the join links)!
performanceobserver.dev