bug#44818: 27.0.91; wedged

[Eli Zaretskii]

> From: Richard Stallman <rms@gnu.org>
> Date: Tue, 01 Dec 2020 23:32:05 -0500
> Cc: 44818@debbugs.gnu.org
> 
> I wonder if it is possible to detect that a single line has taken too
> long, and set a flag to truncate long lines in that buffer.
> Perhaps set truncate-lines.

That could be too drastic: Emacs becomes painfully slow long after the
number of characters exceeds 80 or 130 or 250 or any other reasonable
line width.  So setting truncate-lines would hide too much from the
view.

Also, setting truncate-lines does not make Emacs fast in all cases,
when very long lines are involved.