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SpiderMonkey Retweeted
New blog post, a status report on what I've worked on the last few months in
@SpiderMonkeyJS: making JavaScript to WebAssembly calls faster, reducing code memory usage, implementing a new proposal (anyref) and removing a bunch of code ;)https://blog.benj.me/2018/07/04/mozilla-2018-faster-calls-and-anyref …Thanks. Twitter will use this to make your timeline better. UndoUndo -
SpiderMonkey Retweeted
An Inline Cache isn’t Just a Cachehttps://www.mgaudet.ca/technical/2018/6/5/an-inline-cache-isnt-just-a-cache …
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We support ES6 modules since Firefox 60. Since today we also support the import.meta proposal in
@FirefoxNightly.https://github.com/tc39/proposal-import-meta …Thanks. Twitter will use this to make your timeline better. UndoUndo -
SpiderMonkey Retweeted
Gecko: Intent to ship: Module scripts (ES6 modules)https://groups.google.com/d/msg/mozilla.dev.platform/DZ7YctNoUUk/c2w8Ue8QCgAJ …
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SpiderMonkey Retweeted
.
@evilpies made a very nice chart of the difference before/after this patch (known means monomorphic, generic means polymorphic, rectifier means missing arguments; measure is time in milliseconds, lower is better)pic.twitter.com/8OIFnOMIZt
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SpiderMonkey Retweeted
What this means for the Web: with previous work made on making wasm to JS calls really fast as well, interactions between JS and wasm became almost free. Time to use WebAssembly in your application
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SpiderMonkey Retweeted
Soon, in a
@FirefoxNightly near you: calls from JavaScript to WebAssembly will become about 20 times faster (and only twice as slow as JS to JS calls)

https://bugzilla.mozilla.org/show_bug.cgi?id=1319203 … @SpiderMonkeyJSShow this threadThanks. Twitter will use this to make your timeline better. UndoUndo -
We are going to try shipping Array.prototype.values in Firefox 60. Hopefully this time we won't break any web apps.
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SpiderMonkey Retweeted
<script type="module"> enabled in Nightly builds https://bugzilla.mozilla.org/1428002
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SpiderMonkey Retweeted
The JavaScript Startup Bytecode Cache is enabled in
@Firefox 58, and keeps improving the web page loads https://blog.mozilla.org/javascript/2017/12/12/javascript-startup-bytecode-cache/ … With the help of@MozTelemetry and A/B testing, we can claim that this improves every page load by 43ms, while being enabled on only half of them.Thanks. Twitter will use this to make your timeline better. UndoUndo -
SpiderMonkey Retweeted
Some
@SpiderMonkeyJS performance improvements I worked on this year: https://jandemooij.nl/blog/2017/12/06/some-spidermonkey-optimizations-in-firefox-quantum/ …Thanks. Twitter will use this to make your timeline better. UndoUndo -
SpiderMonkey Retweeted
The @
@species lookup used by array built-ins (and others) that was added in ES6 can be slow in certain cases.@abargull is working on optimizing that. http://bugzil.la/1376572 pic.twitter.com/3q3VoBXits
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The SpiderMonkey shell will now be available at a stable location. For example Beta 58: https://archive.mozilla.org/pub/firefox/releases/58.0b5/jsshell/ …
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Promise.prototype.finally is now available in
@FirefoxNightly!https://github.com/tc39/proposal-promise-finally …Thanks. Twitter will use this to make your timeline better. UndoUndo -
We improved some error messages recently. Before & Afterpic.twitter.com/NllbztuxHY
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SpiderMonkey Retweeted
Thanks to
@fitzgen the@rustlang bindings to the@SpiderMonkeyJS engine are now published! https://crates.io/crates/mozjsThanks. Twitter will use this to make your timeline better. UndoUndo -
SpiderMonkey Retweeted
The Javascript Start-up Bytecode Cache
@nbpname worked on over the last year is now enabled by default https://bugzilla.mozilla.org/1405738Thanks. Twitter will use this to make your timeline better. UndoUndo -
This week we removed legacy generators (without the star) and Function.prototype.isGenerator.
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SpiderMonkey Retweeted
Josephine 0.1.0 is finally out!
@SpiderMonkeyJS's garbage collector can now safely manage@rustlang lifetimes! https://github.com/asajeffrey/josephine/tree/v0.1.0 …Thanks. Twitter will use this to make your timeline better. UndoUndo -
And it's gone! Thanks to a very new contributor as well. A list of other things we plan to remove is here: https://bugzilla.mozilla.org/showdependencytree.cgi?id=1103158&hide_resolved=1 …
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