V8 @v8js
Google’s high-performance open source JavaScript and WebAssembly engine. Our mission: enable developers to build a faster future web. v8.dev Joined July 2017-
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We are thrilled to share that the V8 migration to Chromium Issue Tracker was completed! Feel free to start creating any new issues in the new issue tracker right away: issues.chromium.org/issues/new?com…
🐛Less than 24 hours until we begin the migration to the new V8 Issue Tracker! Feel free to start creating any new issues in the new issue tracker right away: issues.chromium.org/issues/new?com…
🐛V8 will move to a new issue tracker on Thursday, April 18th, which Chromium already moved to earlier this year. Feel free to start creating any new issues in the new issue tracker right away: issues.chromium.org/issues/new?com…
🔒We've been working on a custom in-process sandbox for V8. Find out more about the motivation behind this project and its goals in our new blog post: v8.dev/blog/sandbox
Iterator helpers are a collection of new methods on Iterator prototype that help in general use of iterators. V8 shipped these helpers in v12.2! Please check out v8.dev/features/itera… for more information.
JSPI, which lets you use async JS APIs from sync WebAssembly without asyncifying the entire app, is going to origin trial in Chrome 123! Please see v8.dev/blog/jspi-ot for how to register for the origin trial. We're looking forward to your feedback.
📰 Import attributes are the new import assertions! Starting in V8 v12.3, the old `assert` clause in import statements is deprecated and slated for removal in favor of the new `with` keyword. Read more about the import attributes feature here: v8.dev/features/impor…
🎀 We may have been quiet on the V8 blog, but it's been a busy year for the V8 team! WasmGC, security work, two(!) new compilers, new JS and Wasm features, and even some V8-adjacent Chromium optimisations — with a 34% Speedometer score improvement overall: v8.dev/blog/holiday-s…
We shipped a new compiler named Maglev! It's a mid-tier "good enough, fast enough" compiler that improves our Speedometer score by some 5-6% while dropping power consumption by around 10%: v8.dev/blog/maglev
WebAssembly now has direct support for GC! Read our new technical article to learn about how it works as well as what the team has been doing in this space both in V8 and in the toolchain: v8.dev/blog/wasm-gc-p…
🦚🤙 WebAssembly now supports tail calls! Go read our new blog article to learn more about what tail calls are, how V8 implements them, and also an unexpected use case for C++ coroutines: v8.dev/blog/wasm-tail…
🤩 JSPI lets you use async JS APIs from sync WebAssembly without asyncifying the entire app. See v8.dev/blog/jspi for the details on this exciting experimental feature. 🧪
🗜️ Check out how we compress C++ pointers in Oilpan to reduce memory consumption 📉 v8.dev/blog/oilpan-po…
📢 Want to work on making V8/JavaScript faster and use less memory? We are hiring! 🏎️ careers.google.com/jobs/results/1…
🔥 JavaScript regular expressions are getting more powerful! The RegExp `v` flag enables `unicodeSets` mode, unlocking support for Unicode properties of strings in \p{…}, set notation, string literal syntax, and other new features and improvements. v8.dev/features/regex…
🛑 We are discontinuing release blog posts for V8 releases. But don't worry, you can still get all the information you're used to about new releases! Read on for where to look: v8.dev/blog/discontin…
🚀 Say hello to faster class fields! Learn all about how V8 optimizes new class features in v8.dev/blog/faster-cl…. Thank you to @JoyeeCheung from @igalia for contributing the implementation and blog post.
🔥 What's new in V8 v9.9? Even more Intl.Locale properties and a new Intl.supportedValuesOf() API. v8.dev/blog/v8-releas…
🚮 Oilpan, a garbage collector for C++, is now hosted in V8 as a library. v8.dev/blog/oilpan-li…
🔥 V8 v9.7 brings stabilized support for .findLast and .findLastIndex methods on arrays and TypedArrays! v8.dev/blog/v8-releas…
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🔥 JavaScript regular expressions are getting more powerful! The RegExp `v` flag enables `unicodeSets` mode, unlocking support for Unicode properties of strings in \p{…}, set notation, string literal syntax, and other new features and improvements. v8.dev/features/regex…
Invalid regular expressions now throw “early” parse-time errors in @v8js rather than “late” runtime errors! 🔥 This matches the spec (nice!) and vastly improves developer experience. Previously, if you had an invalid pattern in some unreached function or `if` branch… [1/2]
🎉 New JavaScript features in ES2021: ➡️ logical assignment operators ➡️ numeric separators ➡️ Promise.any ➡️ String.prototype.replaceAll ➡️ WeakRef + FinalizationRegistry v8.dev/features/tags/…
@mariuz_mm @v8js Rust is great a lot of the time, but there are cases where its single ownership model is not really suitable. Complex graphs (such as the DOM) are far less painful to work on with a GC.
Today in the STL foot guns: std::string s; s.append('1', 65); s.append(65, '1'); Both are valid. One adds the character '1' 65 times, another adds the character 'A' 49 times. Which one is which is left as an exercise to the reader! #cplusplus #BadAPI
🚀 For large JSON-compatible objects, JSON.parse is faster than JS object literals. ➡️ True for all browser JavaScript engines! ➡️ Speed-ups from 1.2× to 2× 🎥 My #ChromiumDevSummit lightning talk explains why: youtube.com/watch?v=ff4fgQ…
DevTools now shows how @v8js saves time through streaming compilation, by taking advantage of the wait time for loading JS. Also see v8.dev/blog/backgroun…
I guess things are getting serious now. WDYT @v8js ? github.com/v8/v8/commit/5…
With Electron being Chromium+Node.js, each using @v8js, would that be technically W16?
Nice way to showcase some new-ish JS features 🤓 `n` denotes BigInts: v8.dev/blog/bigint `**` is the exponentiation operator v8.dev/blog/v8-releas… thank u, v8
The answer to life, the universe and everything is JS
@robpalmer2 @mkubilayk @v8js @hashseed The difference isn't as big if you fix the benchmark by wrapping it in a function that uses the values and returns the result (microbenchmarking is hard). Additional checks are needed on the source of destructuring assignment (null, undef), otherwise the code is identical indeed.
The #dls19 keynote: Untangling the web: Memory management in Chrome’s web platform implementation. by @mlippautz He is working on Chrome, @v8js, and Blink, and will discuss how a dynamic language can interact with its ecosystems. Take note: #dls19 will be on Sunday, Oct. 20th!
@robpalmer2 @v8js @joeywatts96 I think I might have made a mistake...
@robpalmer2 @v8js @ChromeDevTools You'll have to negotiate the terms and conditions with the new owners. 😇😇😇
@bmeurer @v8js @ChromeDevTools I hope your successor will match your KPIs on fixing issues and blogging about them within 24 hours of reporting 😉
📢 As of last week I've officially left the @v8js project to work on @ChromeDevTools instead. While that might still involve some work on @v8js (profiler, debugger), it's gonna be a completely new experience for me - like OMG, I might have to write some actual JavaScript. 😱😱😱
This was a fun feature to implement :)
🔥 Weak references and finalizers are (finally) coming to JavaScript! @_gsathya and @mathias explain: v8.dev/features/weak-…
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