Yoav Weiss

@Yoav
1.2K Followers
291 Following
565 Posts
On a mission to make the web faster, one perf feature at a time. WebPerfWG and WICG co-chair. Blink API owner. RICG4life. Opinions are my own, etc.
Show threadYoav WeissDec 22
@matt thanks! I didn't release the demo's code... I can try to do that in the new year
Yoav WeissDec 13
stoyanDec 13

Web Performance Calendar day 13 with Yoav Weiss (@yoav) showing us a clever and creative way to ship *only* critical/necessary CSS for each page type (home, search, etc) while also avoiding duplicate code in the CSS bundles.

https://calendar.perfplanet.com/2025/how-to-load-css-fast/

How to load CSS (fast)

Loading styles on the web is something that looks trivial at first. You just add a <link rel=stylesheet> to your page (or <style> for inline styles) and you're done. But if you wanted to load CSS fast, all of the sudden you run into trouble... Assuming you have a traditional web app (o

Web Performance Calendar
Yoav WeissJan 21, 2025
If you want to get into web platform development and push features into browsers, I wrote a few words that I hope can be useful: https://blog.yoav.ws/posts/so_you_want_to_push_a_web_platform_feature/
So, you want to push a web platform feature?

A guide for pushing new features into standards and browser engines

Yoav WeissOct 31, 2024
daniel:// stenberg://Oct 31, 2024

Delete-Cookie header?

https://lists.w3.org/Archives/Public/ietf-http-wg/2024OctDec/0147.html

Delete-Cookie header?? from Yoav Weiss on 2024-10-31 ([email protected] from October to December 2024)

Yoav WeissOct 18, 2024
Jake ArchibaldOct 18, 2024

I'm excited that we're finally getting a customisable <select> on the web. However, there's one detail of it I'm really not sure about, and I'd like to hear your thoughts.

Have your say before it's too late 😀

https://jakearchibald.com/2024/how-should-selectedoption-work/

How should <​selectedoption​> work?

It's part of the new customisable `<​select​>`, but there are some tricky details.

Yoav WeissAug 23, 2024
@[email protected] it's feasible, but would require a bunch of work and a different loading scheme - an opt in would tell browsers to load the images head first (to get byte ranges of the different resolutions) and only then load the required rest
Show threadYoav WeissAug 23, 2024
@[email protected] https://blog.yoav.ws/posts/responsive_image_container/ from almost 11 years ago is still relevant, and I don't think JXL is it..
Responsive Image Container

Yoav WeissAug 23, 2024
@[email protected] I hear you on the authoring woes (and apologies for failing to make it better), but nothing about jxl enables the "stop when you have enough" bit
Yoav WeissAug 23, 2024
@[email protected] how does jxl do that?
Show threadYoav WeissAug 22, 2024
@meduz I'd love to better understand scenarios you're seeing for more than a single original language (other than content aggregators, I guess), or when would users prefer a translation over the original if they can read it