bug#9218: 24.0.50; bidi-display-reordering slowdown

[Eli Zaretskii]

> From: Florian Beck <abstraktion@t-online.de>
> Cc: abstraktion@t-online.de,  9218@debbugs.gnu.org
> Date: Mon, 01 Aug 2011 21:34:30 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> Does setting bidi-paragraph-direction to left-to-right solve the
> >> problem?
> >
> > I meant without resetting bidi-display-reordering to nil, of course.
> 
> The file opens just as fast as with bidi turned of, yes. Scrolling is
> still somewhat erratic: scrolling down takes 12s the first time

By "scrolling down" you mean all the way to the end, or just one
screenful?

> then, after `(beginning-of-buffer)' it only takes ~1s (as usual for
> that file). But I can live with that.
> 
> But that still requires me to set a per file variable.

I think Org Mode should set bidi-paragraph-direction in all its
buffers.  Can you see any disadvantages to such a solution?