bug#16594: 24.3.50; very slow redraw when resizing windows horizontally

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Thu, 30 Jan 2014 10:44:21 -0500
> Cc: 16594@debbugs.gnu.org, Darren Hoo <darren.hoo@gmail.com>
> 
> Darren's complaint seems to point at each redisplay being slow
> rather than redisplay happening too many times.

I see nothing in the original report that would suggest that redisplay
is slow.  Quite the contrary, it takes a minuscule fraction of the
total time.

Anyway, the "fix" actually makes things worse, so I think you can have
your wish back soon enough.