Michal Mocny
mmocny.com
Michal Mocny
@mmocny.com
Web Vitals, Speed Metrics, and #webperf @ Google.
Previously: AR, Physical Web, WebApps, Startups.
Autodidactic Geek, Woodworker, Sailer. Proud Father of 3 boys.
Pinned
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.
Measuring Interactions and Navigations - Michal Mocny - performance.now() 2025
YouTube video by Web Conferences Amsterdam
www.youtube.com
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.
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
Japanese tourism sign says "please refrain from any acts of nuisance" and my whole life philosophy is shattered...
November 6, 2025 at 8:00 AM
Another wonderful @perfnow.nl conference has flown by.
Love this community, and I return energised with ideas and motivation.
Well, mostly energised...
November 1, 2025 at 7:15 AM
React 19.2 update and the react conf content from yesterday has been great.

I enjoy seeing the references to INP on guiding a lot of the performance and scheduling/coordination work, and the nice integration with modern web features.

Exciting stuff every year.
October 8, 2025 at 2:31 PM
@danabra.mov I've been enjoying your recent posts on RSC.

Re the astro post: overreacted.io/rsc-for-astr... I don't see mention of which both changes some of comparison, and, I think, validates the RSC model.

docs.astro.build/en/guides/vi...

Have you looked at that? Very htmx-ish.
RSC for Astro Developers — overreacted
Islands, but make it fractal.
overreacted.io
May 8, 2025 at 1:39 AM
Whenever anyone on here call a post a "skeet" I cannot help but think of this: youtu.be/3sxRAeh8f7w?...
Rap Roundtable - SNL
YouTube video by Saturday Night Live
youtu.be
December 11, 2024 at 3:58 PM
So is useOptimistic the opposite of useDeferredValue?
December 10, 2024 at 8:50 PM
I guess there's a first for everything.
October 28, 2024 at 8:33 PM