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bug#17588: 24.3.91; mouse-face glitchy

From: Christopher Schmidt
Subject: bug#17588: 24.3.91; mouse-face glitchy
Date: Sun, 25 May 2014 16:04:43 -0400 (EDT)

Eli Zaretskii <address@hidden> writes:
> In general, each redisplay requires removing the mouse-highlight and
> then re-applying it, so if Emacs cannot keep up, you might see
> annoyingly visible flickering or even such extreme effects as you
> describe.  There's nothing new here.

There is no flickering.  The artefacts are permanent.

It can work just fine.  Something triggers the issue.  After triggering,
scrolling or resizing windows of the affected frame usually make the
artefacts disappear again and highlighting works just fine.

The window configuration of my recipe is important, too.  Using just one
rms2 window makes it impossible to reproduce this issue here.

> From: Christopher Schmidt <address@hidden>
> Date: Sun, 25 May 2014 15:04:18 -0400 (EDT)
>> My real use-case, which provokes this issue after a few minutes, is a
>> process filter which updates the buffer of a window exactly once a
>> second.
> May I ask what is the real-life situation where you need to refresh
> the display at such high frequency?

I do not think updating a window once a second is unreasonable.  I have
never seen this issue with 24.3.

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