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WebAssembly brings SIMD support to the Web. What is it?
@dptig and@tlively52 explain and demonstrate how to use it to run native code on the Web even faster!
https://v8.dev/features/simd
(This feature is currently experimental and available under a flag.)Thanks. Twitter will use this to make your timeline better. UndoUndo -
V8 Retweeted
V8 hits its long-awaited v8.0, now with optional chaining, nullish coalescing, faster higher-order builtins — oh and 40% less memory use thanks to pointer compression, no big deal. h8rs gonna h8, V8ers gonna V8


https://v8.dev/blog/v8-release-80 …Thanks. Twitter will use this to make your timeline better. UndoUndo -
V8 hits its long-awaited v8.0, now with optional chaining, nullish coalescing, faster higher-order builtins — oh and 40% less memory use thanks to pointer compression, no big deal. h8rs gonna h8, V8ers gonna V8


https://v8.dev/blog/v8-release-80 …Thanks. Twitter will use this to make your timeline better. UndoUndo -
V8 Retweeted
JavaScript regular expressions are getting more powerful!
RegExp match objects now have an `indices` array that contains the start and end positions for each capturing group.
@MayaLekova explains: https://v8.dev/features/regexp-match-indices …pic.twitter.com/1923QdMchv
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JavaScript is now equipped with a new regular expression enhancement!
@MayaLekova shows how it can be used for finding positions of matched groups. https://v8.dev/features/regexp-match-indices … (This feature is available starting from V8 v7.9 behind a --harmony-regexp-match-indices flag.)pic.twitter.com/dYSYkZwSkF
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V8 Retweeted
Reminder: You have til Monday to apply for a ticket or put in a talk for
#wasmsummit on February 10th in Mountain View, CA!
http://webassembly-summit.org
(Massive shoutout to @ag_dubs,@torch2424 and@ttraenkler for building the website.)pic.twitter.com/LkprTfEsPI
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We are excited to get this rolling!
In case you miss it: There will be live streams and recordings too.https://twitter.com/ag_dubs/status/1199060875048620032 …
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V8 Retweeted
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:https://www.youtube.com/watch?v=ff4fgQxPaO0 …Thanks. Twitter will use this to make your timeline better. UndoUndo -
Emscripten now supports a standalone mode, to better serve the various ways WebAssembly is being used outside of the Web. It enables building and using Wasm modules even in runtimes without JavaScript support. https://v8.dev/blog/emscripten-standalone-wasm …
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What’s new in V8 v7.9? Faster API getters, number representation transitions and repeated on-stack replacements (OSR); more Wasm modules per process with reduced initial memory consumption. https://v8.dev/blog/v8-release-79 …Thanks. Twitter will use this to make your timeline better. UndoUndo -
V8 Retweeted
DevTools now shows how
@v8js saves time through streaming compilation, by taking advantage of the wait time for loading JS. Also see https://v8.dev/blog/background-compilation …pic.twitter.com/G2RnBQfvJP
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V8 Retweeted
Replacing all occurrences of a substring with another string is a common operation. Unfortunately, doing this correctly is surprisingly hard in JavaScript.
The new String.prototype.replaceAll API is here to help!
https://v8.dev/features/string-replaceall …pic.twitter.com/zzwqmXQD91
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JavaScript gains first-class support for global substring replacement!
@mathias explains the new String.prototype.replaceAll API: https://v8.dev/features/string-replaceall … (V8 v8.0 has an experimental implementation behind the --harmony-string-replaceall flag.)Thanks. Twitter will use this to make your timeline better. UndoUndo -
V8 Retweeted
Initial DWARF support has landed in Chrome DevTools! It means that you can resolve stack traces, set breakpoints and step-in/-over source code in C/C++/Rust natively, without generating source maps.pic.twitter.com/s3IwkJV6Tr
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V8 Retweeted
Rerunning code that declare let-variables no longer cause failures in DevTools console. We hope this makes trying out code more convenient!pic.twitter.com/qNagdQlb5v
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V8 Retweeted
What looks like a small change involved a lot of thoughts. We explored design options (https://bit.ly/2JWWZ1l ), and worked with the
@v8js team to implement (https://bit.ly/2NrQp4U ).https://twitter.com/ChromeDevTools/status/1192426360674885632 …
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Top-level await makes it possible to use the `await` keyword outside of async functions in JavaScript modules!
@mylesborins explains: https://v8.dev/features/top-level-await …pic.twitter.com/kB7u7ZFGiq
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Let's [not] keep you in the dark anymore... Introducing dark mode for http://v8.dev ! By default we're going to display the blog according to your system theme, but feel free to override the preference using a toggle in the footer. (h/t
@tomayac)pic.twitter.com/67rH8su3yU
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Regular expressions just got faster *and* more memory-efficient in V8: https://v8.dev/blog/regexp-tier-up …pic.twitter.com/tWNK7YQr3t
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V8 Retweeted
For example, if you want to inspect D8 (pure CLI version of V8) using Chrome DevTools frontend, you can start a WebSocket endpoint with: websocketd d8 --enable-inspector -e "receive=print; while(1) send(readline())"
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WebAssembly Summit 2020!
February 10, 2020
Mountain View, CA
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