Switching to async/await from Task.jsm/yield
kmaglione at mozilla.com
Fri Mar 17 23:41:24 UTC 2017
On Fri, Mar 17, 2017 at 07:30:46PM -0400, Ehsan Akhgari wrote:
>Have we measured the performance of our async/await implementation? I
>think we should definitely do some extensive testing of the performance
>of any new ES primitives before deciding to switch to using them in the
>front-end code en masse. Of course, if the performance result aren't
>good, that doesn't mean we shouldn't use them in the front-end code, it
>means we need to make the performance better. :-) But we need to be
>able to make the trade-off cautiously.
Yes. There was performance testing for the self-hosted version
(which was basically the same as the Promise.jsm implementation)
before it was converted to C++, and after:
In short, it's better, but not hugely.
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