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

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156147

--- Comment #96 from Saam Barati <sbarati at apple.com> ---
(In reply to comment #95)
> Adding more branch prediction hints to the collections of
> `m_runtimeFlags.isAsyncAwaitEnabled() && ...` conditions seems to get a big
> improvement (dramatically fixing regressions in Dromaeo, and significantly
> mitigating the codeload regressions to less than 1% on average).
> 
> I think that's pretty good, but the branch prediction hints will not be
> useful forever, so more work may be needed to keep the parser performing
> well later.
> 
> What do you think?

Can you post the new numbers?

I think this is probably OK for now, but it's worth
thinking about and opening up a bug for making this
fast once we remove the runtime flag. If we can do anything
to help with that now, it's worth it.

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