Sergey Chernyshev
@sergeyche.dev
🎃 reaper and bleeper!
I care about UX speed and organize NY UX Speed and Web Performance meetup
I care about UX speed and organize NY UX Speed and Web Performance meetup
Reposted by Sergey Chernyshev
The CrUX 202510 release is out, and there's an important update on the CrUX Dashboard deprecation. Get all the info from Barry's thread. 👇
🆕 The 202510 Chrome User Experience (CrUX) release is now live on BigQuery!
Check out the announcement post for the full info:
groups.google.com/a/chromium.o...
Highlights below 👇
🧵 1/3
Check out the announcement post for the full info:
groups.google.com/a/chromium.o...
Highlights below 👇
🧵 1/3
Sign in - Google Accounts
groups.google.com
November 11, 2025 at 11:58 PM
The CrUX 202510 release is out, and there's an important update on the CrUX Dashboard deprecation. Get all the info from Barry's thread. 👇
Reposted by Sergey Chernyshev
On November 19, 2025, I will be presenting on an PerformanceObserver meetup. Hope to "see" you all there!
I will be presenting on PerformanceObserver
On November 19, 2025, I will be presenting on the PerformanceObserver meetup. So thrilled, hope to "see" you all there!
aarontgrogg.com
November 10, 2025 at 11:41 PM
On November 19, 2025, I will be presenting on an PerformanceObserver meetup. Hope to "see" you all there!
Folks, this month with have @scottjehl.com present about Web Components and Web Performance! RSVP before November 18! See you all there!
Very excited to host @scottjehl.com for his talk "Web Components Can't Save Us. (But You Can!)" next week!
Find us next Thursday, November 20 at the new Cloudflare NYC office in the iconic 1WTC building.
RSVP: meetup.com/web-performa...
#webperformance #performance #nyc #techevent #techtalk
Find us next Thursday, November 20 at the new Cloudflare NYC office in the iconic 1WTC building.
RSVP: meetup.com/web-performa...
#webperformance #performance #nyc #techevent #techtalk
November 10, 2025 at 6:09 PM
Folks, this month with have @scottjehl.com present about Web Components and Web Performance! RSVP before November 18! See you all there!
Reposted by Sergey Chernyshev
as seen in the skint, robot karaoke is back at wonderville on monday www.wonderville.nyc/events/robot...
November 7, 2025 at 7:44 PM
as seen in the skint, robot karaoke is back at wonderville on monday www.wonderville.nyc/events/robot...
Reposted by Sergey Chernyshev
⚡Featured posts this week:
✨ @cloudflare.social TELESCOPE: @sergeyche.dev & @tkadlec.bsky.social
✨ Optimizing Webfonts: Lucas Dohmen
✨ How to optimize SVG files: @laurakalbag.bsky.social
✨ Using the Web Monetization API: @tomayac.com
🙏 Special thanks to the authors!
#webperf
✨ @cloudflare.social TELESCOPE: @sergeyche.dev & @tkadlec.bsky.social
✨ Optimizing Webfonts: Lucas Dohmen
✨ How to optimize SVG files: @laurakalbag.bsky.social
✨ Using the Web Monetization API: @tomayac.com
🙏 Special thanks to the authors!
#webperf
November 9, 2025 at 1:18 PM
⚡Featured posts this week:
✨ @cloudflare.social TELESCOPE: @sergeyche.dev & @tkadlec.bsky.social
✨ Optimizing Webfonts: Lucas Dohmen
✨ How to optimize SVG files: @laurakalbag.bsky.social
✨ Using the Web Monetization API: @tomayac.com
🙏 Special thanks to the authors!
#webperf
✨ @cloudflare.social TELESCOPE: @sergeyche.dev & @tkadlec.bsky.social
✨ Optimizing Webfonts: Lucas Dohmen
✨ How to optimize SVG files: @laurakalbag.bsky.social
✨ Using the Web Monetization API: @tomayac.com
🙏 Special thanks to the authors!
#webperf
Reposted by Sergey Chernyshev
My recording from @perfnow.nl is now up on YouTube: www.youtube.com/watch?v=sDHS...
I was a bit nervous, and very tired, but I think it went okay.
I was a bit nervous, and very tired, but I think it went okay.
Measuring Interactions and Navigations - Michal Mocny - performance.now() 2025
YouTube video by Web Conferences Amsterdam
www.youtube.com
November 7, 2025 at 3:11 AM
My recording from @perfnow.nl is now up on YouTube: www.youtube.com/watch?v=sDHS...
I was a bit nervous, and very tired, but I think it went okay.
I was a bit nervous, and very tired, but I think it went okay.
Reposted by Sergey Chernyshev
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/...
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/...
How Fast Is Fast Enough? [PerfNow 2025]
It sounds like a simple question, but if you've been working in web performance long enough, you know the answer is far from straightforward. In this ke…
speakerdeck.com
October 30, 2025 at 9:30 AM
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/...
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/...
Reposted by Sergey Chernyshev
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...
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.
www.speedcurve.com
October 31, 2025 at 9:18 AM
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...
www.speedcurve.com/blog/guide-l...
My talk at Performance.sync() pre-conference meetup organized by @mozilla.org in Amsterdam last week: www.youtube.com/watch?v=2cv6...
7 Levels of a Web Performance Journey - Sergey Chernyshev - performance.sync() 2025
YouTube video by Web Conferences Amsterdam
www.youtube.com
November 6, 2025 at 11:53 PM
My talk at Performance.sync() pre-conference meetup organized by @mozilla.org in Amsterdam last week: www.youtube.com/watch?v=2cv6...
Very happy to work on a tool like that with @tkadlec.bsky.social and the team!
Please try it out and post the issues and PRs.
Please try it out and post the issues and PRs.
Telescope, the new cross-browser performance testing agent I mentioned at #perfnow that we @cloudflare.social have open-sourced is here: github.com/cloudflare/t...
We want this to be a tool the entire community is able to contribute to and benefit from, so please help us make it better!
We want this to be a tool the entire community is able to contribute to and benefit from, so please help us make it better!
GitHub - cloudflare/telescope: Cross-browser web performance testing agent
Cross-browser web performance testing agent. Contribute to cloudflare/telescope development by creating an account on GitHub.
github.com
November 6, 2025 at 11:41 PM
Very happy to work on a tool like that with @tkadlec.bsky.social and the team!
Please try it out and post the issues and PRs.
Please try it out and post the issues and PRs.
Reposted by Sergey Chernyshev
If you don't want a firehose of modern insights into web performance cluttering up your timeline, don't follow @perfnow.nl
October 30, 2025 at 2:27 PM
If you don't want a firehose of modern insights into web performance cluttering up your timeline, don't follow @perfnow.nl
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...
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...
GitHub - cloudflare/telescope: Cross-browser web performance testing agent
Cross-browser web performance testing agent. Contribute to cloudflare/telescope development by creating an account on GitHub.
github.com
October 30, 2025 at 2:32 PM
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...
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...
Reposted by Sergey Chernyshev
October 30, 2025 at 11:39 AM
New status for upcoming holidays here in the US "🎃 Reaper and Bleeper"!
@tkadlec.bsky.social said he enjoys it ;)
@tkadlec.bsky.social said he enjoys it ;)
October 23, 2025 at 6:24 PM
New status for upcoming holidays here in the US "🎃 Reaper and Bleeper"!
@tkadlec.bsky.social said he enjoys it ;)
@tkadlec.bsky.social said he enjoys it ;)
Reposted by Sergey Chernyshev
Reposted by Sergey Chernyshev
We’ve just released some shiny new docs for the Insights so you’ll know exactly what they measure and how to pass them. Check them out:
developer.chrome.com/docs/perform...
developer.chrome.com/docs/perform...
Performance | Chrome for Developers
developer.chrome.com
October 7, 2025 at 8:03 PM
We’ve just released some shiny new docs for the Insights so you’ll know exactly what they measure and how to pass them. Check them out:
developer.chrome.com/docs/perform...
developer.chrome.com/docs/perform...
Reposted by Sergey Chernyshev
Can relate. Started uni in 2010, got into going to meet-ups, blogging and tweeting and pretty much every job since has been influenced by someone I met doing all that. It's the thing that makes me most sad about about what Twitter has become.
If you were in tech and decent at posting between like 2010 and 2018 it opened a lot of doors.
Has anything great happened in your life because of social media?
October 9, 2025 at 5:17 AM
Can relate. Started uni in 2010, got into going to meet-ups, blogging and tweeting and pretty much every job since has been influenced by someone I met doing all that. It's the thing that makes me most sad about about what Twitter has become.
I’m an anyone from my Bsky crowd going to the Catskills Mountains Maker Camp this weekend?
October 10, 2025 at 12:28 AM
I’m an anyone from my Bsky crowd going to the Catskills Mountains Maker Camp this weekend?
Reposted by Sergey Chernyshev
I mentioned before that we’re switching Lighthouse Performance audits to the new and improved Insights. The same Insights that you can see in DevTools Performance panel traces.
That’s happening in Lighthouse 13 due to be released very soon. Maybe even this week!
That’s happening in Lighthouse 13 due to be released very soon. Maybe even this week!
October 7, 2025 at 8:02 PM
I mentioned before that we’re switching Lighthouse Performance audits to the new and improved Insights. The same Insights that you can see in DevTools Performance panel traces.
That’s happening in Lighthouse 13 due to be released very soon. Maybe even this week!
That’s happening in Lighthouse 13 due to be released very soon. Maybe even this week!
Having some Mother’s milk with my dinner in West Village after a long day at Goggle DevFest.
October 3, 2025 at 10:54 PM
Having some Mother’s milk with my dinner in West Village after a long day at Goggle DevFest.
Reposted by Sergey Chernyshev
🙋 have you ever _wanted_ to deploy a @nuxt.com site to some provider bc of their features/dx/price but decided not to because of a limitation in nuxt?
(would love to know even minor nitpicks or frictions)
(would love to know even minor nitpicks or frictions)
September 22, 2025 at 4:51 PM
🙋 have you ever _wanted_ to deploy a @nuxt.com site to some provider bc of their features/dx/price but decided not to because of a limitation in nuxt?
(would love to know even minor nitpicks or frictions)
(would love to know even minor nitpicks or frictions)
Reposted by Sergey Chernyshev
Before, you needed a plugin to use Baseline semantics in your Browserslist queries. Now you don't!
Just give it a target like `baseline widely available` and it'll work out of the box
Available in [email protected] and later
web.dev/blog/browser...
Just give it a target like `baseline widely available` and it'll work out of the box
Available in [email protected] and later
web.dev/blog/browser...
Browserslist now supports Baseline | Blog | web.dev
Browserslist has added support for Baseline queries. Find out what that could mean for your developer workflow.
web.dev
September 16, 2025 at 6:47 PM
Before, you needed a plugin to use Baseline semantics in your Browserslist queries. Now you don't!
Just give it a target like `baseline widely available` and it'll work out of the box
Available in [email protected] and later
web.dev/blog/browser...
Just give it a target like `baseline widely available` and it'll work out of the box
Available in [email protected] and later
web.dev/blog/browser...
It is new life when I can drink my cognac with my son who’s drinking bourbon while watching a great cinema with a great idea, powerful enough that it inspired a hacker movement to take on an identity created by a corporate brand.
Showed my youngest “V for Vendetta” tonight. It feels like a proper movie and I have a mask somewhere. Although this one was made with a WB corporate license. I wonder though if license and money are necessarily orthogonal to “the idea”.
September 21, 2025 at 2:11 AM
It is new life when I can drink my cognac with my son who’s drinking bourbon while watching a great cinema with a great idea, powerful enough that it inspired a hacker movement to take on an identity created by a corporate brand.
Showed my youngest “V for Vendetta” tonight. It feels like a proper movie and I have a mask somewhere. Although this one was made with a WB corporate license. I wonder though if license and money are necessarily orthogonal to “the idea”.
September 21, 2025 at 2:05 AM
Showed my youngest “V for Vendetta” tonight. It feels like a proper movie and I have a mask somewhere. Although this one was made with a WB corporate license. I wonder though if license and money are necessarily orthogonal to “the idea”.
A team that I was supporting for a while now - Precious Plastic. They are planning Version 5 building on a long history of community work they are doing for 10 years already.
They need your help so they can help all of us address plastic problem!
Version 5: www.youtube.com/watch?v=hJ0I...
They need your help so they can help all of us address plastic problem!
Version 5: www.youtube.com/watch?v=hJ0I...
How we're going to build the largest plastic recycling project in the world
YouTube video by One Army
www.youtube.com
September 9, 2025 at 3:35 AM
A team that I was supporting for a while now - Precious Plastic. They are planning Version 5 building on a long history of community work they are doing for 10 years already.
They need your help so they can help all of us address plastic problem!
Version 5: www.youtube.com/watch?v=hJ0I...
They need your help so they can help all of us address plastic problem!
Version 5: www.youtube.com/watch?v=hJ0I...