Le 21/04/2013 19:09, Brendan Eich a écrit :
Domenic Denicola wrote:
Doing a quick poll of some IRC rooms, there's some call for
shared-memory multithreading. I know this was a concern of the asm.js
project, or more generally for the JS-as-a-compilation-target
mission. I don't think this is a good idea, but just passing it along.
We're researching still and will not let arbitrary data races violate
JS semantics (for one thing, this would hit all JITs that speculate
assuming invariants obtained from JS's event-loop concurrency within
the same realm, er, window -- it would break them all, AFAICT).
It may be that a Parallel JS "patient parent" model where
non-overlapping slices of an array-buffer are handed off to workers,
with results written back race-free, is enough for the interesting
use-cases.
Data ownership (like HTML5 Transferables or Rust unique pointers) is
another interesting track that covers different (also interesting) use
cases in my opinion.
Probably to be considered as part of the ES7/ES8 work on "The semantics
of inter-vat communications"
David
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