I wrote a thing! Here's my hot take on where WebAssembly should go next.
https://hacks.mozilla.org/2026/02/making-webassembly-a-first-class-language-on-the-web/
Remote
Ryan Hunt
@ryan@social.eqrion.net
mastodon 4.7.2Working on WebAssembly at Mozilla!
60 Followers
50 Following
21 Posts
Joined September 09, 2025
Have you ever wanted to learn about the architecture of a production JS engine?
This video by Luke Wagner on SpiderMonkey is a great start. It's from a 2018 Mozilla event, and was just made public. Most of the details are still accurate AFAIK.
https://mozilla.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=14c5c021-e5d7-4604-ae5f-ac32013870a1
Just had two NPE's this week (aka. Near Pwned2Own Experiences).
Always remember: Index liberatus, vita nulla
Replying to
alt: my yearly offering to the white tailed deer population.
It's gonna be one of those sorts of days, huh?
Replying to
@wingo@mastodon.social @mjk@hachyderm.io
Always good to be the best of the worst :)
I'd take a look at JetStream (https://github.com/webkit/jetstream) It's moved to an open governance model and is open to new workloads.
We want workloads to be representative of real content, so there's a medium-to-high bar to be a default workload. But we'd also like to have experimental workloads that browsers can run optionally, and have a permissive policy for that.
Replying to
Replying to
@esoterra Ah, sorry to hear that. I don't have any influence over MDN editorial policies unfortunately.
Replying to
@wingo@mastodon.social Interesting! Spidermonkey has done almost no optimization for tail calls. There could be some low hanging fruit there.
One hard part is saving/restoring Instance state across tail calls. We biased our ABI towards normal calls at the expense of tail calls
Nothing summons a foot of snow quicker than whispering to yourself “I think spring is finally here”.
You know you're working on something fun when you need to break out the ASCII diagrams.
I fear no man.
But that thing...
[Implicit Integer Promotion Rules]
...it scares me.
Replying to
Anyone interested in contributing is welcome to join the #webassembly channel on MDN's discord.
https://discord.gg/9kqNjFdfpD
free-solo climbing is cool and all, but have you ever had to carry 2000 lines of uncommitted code on your clipboard while rewriting a different file?
Does anyone have recommendations for a good pre-built desktop build machine? System76 looks neat, but I’ve never had one before.
Interested in getting involved in WebAssembly standards?
The JS type reflection proposal needs a champion! Mentorship would be available. We'd love to see new folks in wasm standards.
Current proposal is here: https://github.com/WebAssembly/js-types/
wife: we need to talk about our plans for tonight
me: wow look at the discontinuity on this snow dune
Replying to
@dazo
Just an FYI, Mozilla’s privacy policy commits to “We never sell your personal data.”
https://www.mozilla.org/en-US/privacy/faq/
