bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode

[Eli Zaretskii]

> From: Chong Yidong <cyd@gnu.org>
> Cc: 10835@debbugs.gnu.org
> Date: Sat, 18 Feb 2012 01:39:23 +0800
> 
> Here are the line numbers at which the printf is triggered (and how many
> times consecutively they get triggered, in parentheses):

Thanks.  This means redisplay is invoked every 90 lines,
approximately, which is even less than in my case (I see a cycle of
redisplay every 40-50 lines of inserted input).  The plot thickens...

What does "time ls /usr/share/doc" say, when you run it from the shell
buffer?  What are the times it reports, and are they approximately the
same in each of the 4 invocations?