
José Dapena Paz
Free software developer at Igalia Chromium team.

How do you measure rendering performance for entire DOM subtrees without slowing down the browser? ⏱️
✍ In my new blog post, I dive into the technical details of how I implemented the new Container Timing #webperf API in #Blink / #Chromium.
Instead of reinventing the wheel, we reuse existing Paint detection and "bubble up" events to a container root, efficiently aggregating them.
Read more about the architecture and how to test it today! ✍
It’s day one at #BlinkOn 21! 🌐 @igalia@floss.social will present some lightning talks today, at 1:30pm PDT:
- @byungwoo@mastodon.social Bringing CTAP 2.2 hmac-secret-mc Support to #Chromium.
- @gyuyoung@mastodon.social Progress on Blink for Apple tvOS.
The Container Timing API is officially moving to a Chromium Origin Trial (M148 to M153)! 🚀.
Read my new blog post for more info and registration details: ✍️ https://blogs.igalia.com/dape/2026/04/14/container-timing-moving-to-origin-trial/.
I will also be presenting a year-in-review lightning talk of the work in Container Timing: 🗣️ April 21st in #BlinkOn 21. I won’t be on-site this year, but I’ll be active on the conference Slack. Catch the talk and let’s connect there!
cc @igalia@floss.social @developers@chromium.social #WebPerf