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Re: Can we make set_point_both less expensive?

From: Stefan Monnier
Subject: Re: Can we make set_point_both less expensive?
Date: Wed, 18 Mar 2015 08:55:06 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

>>>>> Then redisplay would have to move `point' back to the window.
>>>> Indeed.
>>> And would run pre-redisplay-hook again.
>> That's right.
> Then why would we OT1H care about removing a function from
> `post-command-hook' whenever it causes an error and OTOH not care about
> running into an endless loop with pre-redisplay-hook?

We don't have to have an endless loop.  We can decide to stop the loop
at any point.   Since such inf-loop would be an error in any case it's
perfectly OK to end up with an "incorrect" display.

Currently we decide to stop the loop before it can even start, so we end
up with an incorrect display even if there would not be any such


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