RE: recover file after crash

["Ludwig, Mark" <ludwig.mark@siemens.com>]

> From:  drain
> Sent: Friday, January 25, 2013 2:32 PM
> To: Help-gnu-emacs@gnu.org
> Subject: Re: recover file after crash
> 
> Eli Zaretskii wrote
> > Because what is one line on display may be many lines of text in the
> > buffer, and redisplay needs to traverse them all.
> 
> Makes sense. I'm glad to know there is a clear technical reason for it, and
> that it is not symptomatic of a poorly optimized installation.
> 
> In any case, I sent Valentin a large file that tends to lag (didn't want to
> impose a large attachment on the mailing list).

I think I thoroughly documented this in Bug # 9589
(http://debbugs.gnu.org/cgi/bugreport.cgi?bug=9589) for the
developers to consider, which see.  (No attachment is
required to reproduce the behavior.)  It has been merged
with bugs 3219 and 4123, both of which also document how to
show the problem without a specific attachment.

You might also be interested in some of the experimental
results I documented in bug 9589 about which commands
respond consistently (i.e., quickly with long lines) and
which are sensitive to the line length and/or buffer
position.

Good luck,
Mark