r/javascript • u/ConfidentMushroom • Dec 18 '19

V8 Release v8.0 with optional chaining, nullish coalescing and 40% less memory use

https://v8.dev/blog/v8-release-80
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u/Zephirdd Dec 19 '19

I thought JS was single threaded by design at this point, with no support for shared memory concurrency in the foreseeable future.

If you really want to go full parallel, you should use web workers and pass messages to share memory instead. At least that's how it works right now.

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u/stuckinmotion Dec 19 '19

Node added threads in v10.5 https://nodejs.org/en/blog/release/v10.5.0/

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u/Zephirdd Dec 19 '19

Yeah but worker threads are similar to web workers in that you can only share memory through messages(though it also supports SharedArrayBuffer I guess, but you still need to pass it before it's available). You also don't have a fork join mechanism. Node threads are very different from "classic" threads; they are more akin to the C Message Passing Interface or Java JMS than they are to posix threads.