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V8
Google’s high-performance open source JavaScript engine. Our mission: enable developers to build a faster future web.
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V8 Oct 15
What’s new in V8 v7.0? WebAssembly threads, Symbol#description, and embedded built-ins on more platforms!
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V8 Sep 28
Array.prototype.sort is now stable in v7.0 / Chrome 70! 🎉 explains how and why we made this happen:
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Mathias Bynens Sep 27
Replying to @mathias
In completely unrelated news, is now open-source: 🎉
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Benedikt Meurer Sep 27
🔥 First working prototype of zero-cost async stack traces in (for async functions). This should make diagnosing production issues in and a lot easier once ready. 😀
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V8 Sep 27
🔥 ’s presentation titled “ code caching for JavaScript developers” is now available! Video: Slides:
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V8 Sep 24
Replying to @rajadain
The site isn’t down. What happens if you try to connect?
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V8 Sep 24
🎉 The V8 project has a new website: Just like V8 itself, we tried to make it fast and usable. Let us know what you think!
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Leszek Swirski Sep 21
I gave another talk on code caching at Skills Matter, this time with a focus on JS developers:
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V8 Sep 18
It’s already in Chrome Canary 69.
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V8 Sep 18
🔥 DataViews are now as efficient as TypedArrays in v6.9, finally making DataViews a viable choice in performance-critical situations.   Here’s how we boosted DataView performance:
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V8 Sep 18
🔥 DataViews are now as efficient as TypedArrays in v6.9, finally making DataViews a viable choice in performance-critical situations.   Here’s how we boosted DataView performance:
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V8 Sep 13
🔥 Jest reduced their test runner time by 20% by switching from plain JavaScript objects to Maps where it made sense. In general, don’t be afraid to use modern features! Focus on writing idiomatic code, and let JS engines worry about making it fast.
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V8 Sep 11
Happy 10th birthday to and ! 🎂 Here’s an overview of how the project evolved during the last 10 years:
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V8 Sep 11
Happy 10th birthday to and ! 🎂 Here’s an overview of how the project evolved during the last 10 years:
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Mathias Bynens Sep 3
Array.prototype.sort is now stable in v7.0 / Chrome 70! 🎉 Previously, V8 used an unstable QuickSort for arrays with more than 10 elements. Now, we use the stable TimSort algorithm. Demo:
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Franziska Hinkelmann, Ph.D. Sep 3
“V8 Internals: How Small is a ‘Small Integer?’”
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V8 Aug 21
Replying to @sw12 @Davidhaggie
nailed it! It’s a reduction in memory consumption. Everybody wins!
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V8 Aug 20
🚀 V8 v6.9 includes Liftoff, a new baseline compiler for WebAssembly! Liftoff vastly reduces start-up time of WebAssembly applications with a simple and fast code generator.
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V8 Aug 16
🔥 JavaScript engine fundamentals: optimizing prototypes ➡️ Why do some engines have 2+ optimization tiers? ➡️ Why not just optimize everything? ➡️ How do engines speed up classes? ➡️ Bonus: One Weird Performance Trick™ by &
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V8 Aug 14
V8 v6.9 embeds built-in code into the binary’s `.text` section, reducing the median V8 heap size per website by 19%.  
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