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

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Message #82 received at 2530 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: Chong Yidong <cyd <at> stupidchicken.com>, 2530 <at> debbugs.gnu.org,
        David Reitter <david.reitter <at> gmail.com>, Ian Eure <ian <at> digg.com>,
        Adrian Robert <adrian.b.robert <at> gmail.com>,
        Emacs-Devel devel <emacs-devel <at> gnu.org>
Subject: Re: 23/NS: redraws according to mouse-face are slow
Date: Wed, 06 May 2009 16:40:52 +0900

>>>>> On Tue, 05 May 2009 21:47:04 -0400, Stefan Monnier <monnier <at> iro.umontreal.ca> said:

>>> That ns_update_begin() acheives the same effect suggests that
>>> perhaps the core mouse face code should do this (through the RIF).
>> Yes, show_mouse_face (or one of its callers) should probably call
>> update_begin and update_end.  But it's a little far along in the
>> pretest to risk that.  I'll make a note of revisiting this after
>> the release.

> I think as long as this is guaranteed to only affect the NS port, we
> can still install it before the release (assuming tests indicate it
> does improve the behavior, and assuming we agree that it's the right
> way to fix it).

That introduces nesting in update_begin/end.  We should avoid such a
change at this stage.

				     YAMAMOTO Mitsuharu
				mituharu <at> math.s.chiba-u.ac.jp

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