Has anyone measured recently whether there's still a significant perf win
to making IIDs 32-bit? If we stop using them as a versioning tool, we could
potentially relax our uniqueness requirements, and save a lot of
comparisons on each QI. Addon-compat would be tricky, but is potentially
solvable.

It may be that we've optimized enough stuff that we don't QI on the hot
paths anymore. But it might be worth a day of someone's time to check if it
makes any difference on Talos.

On Fri, Jan 15, 2016 at 10:55 AM, Patrick McManus <mcma...@ducksong.com>
wrote:

> On Fri, Jan 15, 2016 at 10:58 AM, Ehsan Akhgari <ehsan.akhg...@gmail.com>
> wrote:
>
> > Please let me know if you have any questions or concerns.
>
>
>
> or cheers.
>
> cheers!
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