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.
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...
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.
shopify.com
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...
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.
developer.chrome.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
youtube.com
Japanese tourism sign says "please refrain from any acts of nuisance" and my whole life philosophy is shattered...
Another wonderful @perfnow.nl conference has flown by. Love this community, and I return energised with ideas and motivation. Well, mostly energised...
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.
@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.
RSC for Astro Developers — overreacted
Islands, but make it fractal.
overreacted.io
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