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v8.devJavaScript modules · V8This article explains how to use JavaScript modules, how to deploy them responsibly, and how the Chrome team is working to make modules even better in the future.

I don't think it matters for the web. But does for Node and the like: v8.dev/features/mod...

okay, so the docs I linked are outdated?

17/11/24, 3:28 pm0 reposts0 likes

Barry Pollard

@tunetheweb.com

web.devCode-split JavaScript | web.devSome resources are not crucial to a web page's initial load. JavaScript is one such resource that can be deferred until the time of need through a technique known as code splitting. By doing so, y...

And yet oddly written after the doc I linked! @kevinfarrugia.bsky.social did you write web.dev/learn/perfor... ? Got any more info on mjs file extension?

Rob Palmer

@robpalmer.bsky.social

Oh wow. This is really unexpected to here that ESM in *.js will disable optimizations. I hope it is confirmed as being outdated.

github.com[blink] 2/2 Module streaming compilation for <link rel=preload> · chromium/chromium@3e261ebUse .mjs file extension to hint that a script should be streaming-compiled as module. Bug: 1178198 Change-Id: I3a99ef1131fbdb52cf439b488cd78485a955d8cf Reviewed-on: https://chromium-review.googles...

I wonder if the source for this comment in the docs is this commit/optimisation which only applies for missing `modulepreload`: bsky.app/profile/dani...

daniel r(ooooooh) in nyc 🇺🇸@danielroe.dev

for example, this commit (if it's the _only_ optimisation) seems to suggest it might just apply to link preloads where `modulepreload` is not explicitly set: github.com/chromium/chr...

Kevin Farrugia

@imkev.dev

Yes I did. After writing the module, we received feedback from the V8 team (including that the doc you linked is outdated). The problem is that it fails silently so it doesn't show up in a trace. Tomorrow I can send you all the info I have as I'm not on my laptop. Cc @kurtextrem.de

Jacob "kurtextrem" Groß

@kurtextrem.de

v8.devThe cost of JavaScript in 2019 · V8The dominant costs of processing JavaScript are download and CPU execution time.

Tagging also @addyosmani.bsky.social and @mths.be, as e.g. I know some info in this article: v8.dev/blog/cost-of... is also outdated by now (the streaming thresholds for example). Do we have any public docs regarding script streaming that have info on how it works in Chromium & Node in 2024?

Jacob "kurtextrem" Groß

@kurtextrem.de

Let's see! Happy to stand corrected (at least for more recent versions of chrome/V8, I suppose?)

I _think_ @kevinfarrugia.bsky.social thought the impact was minimal (but if it's even slight I think we should reconsider our default format in @nuxt.com and possibly also in @vite.dev). the key thing I'd like to confirm is that it really is the case first ...

for example, this commit (if it's the _only_ optimisation) seems to suggest it might just apply to link preloads where `modulepreload` is not explicitly set: github.com/chromium/chr...

Noam Rosenthal

@nomster.bsky.social