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Michal Mocny

@mmocny.com
1.1K followers 414 following 62 posts

Web Vitals, Speed Metrics, and #webperf @ Google. Previously: AR, Physical Web, WebApps, Startups. Autodidactic Geek, Woodworker, Sailer. Proud Father of 3 boys.

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Reposted by Michal Mocny
Mateusz Krzeszowiak @krzksz.bsky.social · 28/04/2026
One of the most important pieces about web performance that I've ever worked on is finally live. After a few months of work, my analysis of the correlation between site speed and conversion across the entire @Shopify platform is out: www.shopify.com/enterprise/b...
shopify.com
Store Speed and Conversion: What the Data Shows (2026) - Shopify
How does site speed relate to sales? Find out in this Shopify data deep dive.
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Reposted by Michal Mocny
Barry Pollard @tunetheweb.com · 20/04/2026
Wanna measure Core Web Vitals for SPAs? It's been a long-standing gap, but one that we've been working hard to fill. We're approaching the final stages and have launched one last origin trial (🤞) as the "last call" before we ship it! More details: developer.chrome.com/blog/final-s...
developer.chrome.com
Final Soft Navigations origin trial starting in Chrome 147  |  Blog  |  Chrome for Developers
Take a last chance to try out the Soft Navigations API before release with this final origin trial.
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Michal Mocny @mmocny.com · 07/11/2025
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.
youtube.com
Measuring Interactions and Navigations - Michal Mocny - performance.now() 2025
YouTube video by Web Conferences Amsterdam
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Michal Mocny @mmocny.com · 06/11/2025
Japanese tourism sign says "please refrain from any acts of nuisance" and my whole life philosophy is shattered...
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Michal Mocny @mmocny.com · 01/11/2025
Another wonderful @perfnow.nl conference has flown by. Love this community, and I return energised with ideas and motivation. Well, mostly energised...
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Michal Mocny @mmocny.com · 08/10/2025
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.
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Michal Mocny @mmocny.com · 08/05/2025
@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 <ClientRouter> 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.
overreacted.io
RSC for Astro Developers — overreacted
Islands, but make it fractal.
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Michal Mocny @mmocny.com · 11/12/2024
Whenever anyone on here call a post a "skeet" I cannot help but think of this: youtu.be/3sxRAeh8f7w?...
youtu.be
Rap Roundtable - SNL
YouTube video by Saturday Night Live
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Michal Mocny @mmocny.com · 10/12/2024
So is useOptimistic the opposite of useDeferredValue?
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Michal Mocny @mmocny.com · 28/10/2024
I guess there's a first for everything.
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