bug#2530: 23/NS: redraws according to mouse-face are slow

[Andrew Hyatt]

There's a bunch of discussion before, in 2009, but as of now, for Emacs
25, I don't notice any particular slowness on El Capitan.  Can anyone
still reproduce a problem here?

David Reitter <david.reitter@gmail.com> writes:

> On May 5, 2009, at 10:13 AM, Chong Yidong wrote:
>
>> Could either your or David check in the nsterm.m fix, assuming no other
>> problems turn up with it?
>
> I will test it for a day or two, but check it in soon.
>
> I still think there are other places where the same technique would be
> beneficial, but they would be outside of ns*.m, albeit in #ifdefs.  From the
> sound of your messages, I take it we'll hold off on that.
>
> Getting back to Ian's original point: Overall, if we were to release now, I
> would consider the NS port "usable", but "experimental" rather than "stable".