Web Performance Developer Advocate for Google Chrome helping to make the web go faster! All opinions my own.
Mostly on Bluesky (https://bsky.app/profile/tunetheweb.com) I'll be honest, but still respond to pings here!
| https://twitter.com/tunetheweb | |
| Website | https://www.tunetheweb.com |
| GitHub | https://github.com/tunetheweb |
| Bluesky | https://bsky.app/profile/tunetheweb.com |
First up:
Fronteers Dark Mode in Dordrecht 🇳🇱 on October 2nd. With Cyd Stumpel, @heydon, @csswizardry, @tunetheweb and Anjana Vakil. And @jaffathecake as our MC.
An amazing location and tickets only cost €99, and include dinner. Don't miss this!
🎟️ fronteersconf.org
Declarative partial updates. @tunetheweb and @nomster introduce two new web platform proposals for inserting HTML out of order. Processing instructions like <?marker> and <?start>/<?end> paired with <template> let servers stream HTML into specific document locations without waiting for sequential delivery. New JavaScript methods setHTML, appendHTML, and streamHTML bring consistent naming for partial updates. Polyfills are on npm. #html
https://developer.chrome.com/blog/declarative-partial-updates
I'm excited to share 15 updates from Google I/O 2026. We have updates across the agentic web, new capabilities and some great tools for developers.
https://developer.chrome.com/blog/chrome-at-io26
If you are at IO, come and talk to me and the team in the Chrome area.
If you want to know more about Container Timing, @tunetheweb and @jasonwilliams have prepared a post at @developers blog (I helped a bit!).
https://developer.chrome.com/blog/container-timing-origin-trial
cc @igalia
The first reviews of my new book on software performance engineering are coming in:
⭐ "A manifesto against enshittification."
⭐ "The most principled engineering book I've read in a long time."
⭐ "The best chapters in this book are worth a whole book."
And it's now 50% off with code “MLOdell” until 26 March: https://hubs.la/Q044cvlc0
You can prevent most software performance problems if you recognize their predictable patterns. Performance Engineering in Practice introduces author Den Odell’s Fast by Default model that replaces the slow fix-it-later path with a unique framework to build in performance from the start. Den Odell’s System Paths framework provides a universal diagnostic language for performance that works across any platform or stack to keep your systems fast even as your codebase, team, and user base grow. You’ll work through hands-on examples like slow internal dashboards and cascading problems from a degraded API. Effective profiling tools, shared dashboards, CI budgets, and design reviews all ensure your performance goals are user-centered and your team is aligned and accountable.
Web Performance Calendar day 23 with @tunetheweb on configuring caches to ignore non-content-affecting URL params and reclaim performance. No more of this query string = cache miss nonsense.
https://calendar.perfplanet.com/2025/fixing-the-url-params-performance-penalty/
Speculation Rules Improvements, by @tunetheweb (@matuzo):
On day 3 @tunetheweb introduces us to Speculation Rules and recent improvements to the API that help us speed up our websites. #HTMHellAdventCalendar
Niels Leenheer
Web Standards
Paul Kinlan
José Dapena Paz
Den Odell
Thomas Steiner 
stoyan
Frontend Dogma
Manuel Matuzović