[Webkit-unassigned] [Bug 156147] [JSC] implement async functions proposal

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Apr 5 13:08:17 PDT 2016


--- Comment #24 from Caitlin Potter (:caitp) <caitp at igalia.com> ---
(In reply to comment #23)
> (In reply to comment #19)
> > Created attachment 275529 [details]
> > Patch
> > 
> > don't tokenize async/await as keywords, hopefully not costing too much perf
> Can you test parser performance on this? Specifically, octane's
> jquery/closure benchmarks.
> I'm working on making our parser faster as we've
> regressed 10% since we've implemented arrow functions
> and I don't want to introduce anything that slows the
> parser down.

It was regressing CodeLoad by quite a lot. I've managed to get it down to about a ~5% regression on average with some improvements for arrow function and method parsing, and can probably squeeze a few more out of it in other ways.

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