bug#15555: Re: bug#15555: 24.3; Bidirectional display very slow with long lines

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Eli Zaretskii <eliz@gnu.org>,  15555@debbugs.gnu.org
> Date: Tue, 18 Feb 2014 09:04:56 -0500
> 
> > Are you sure that bidi_copy_it doesn't add one more bottleneck to the whole
> > stuff?
> 
> Eli's argument is not that bidi adds its own bottlenecks, but that there
> are sufficiently other bottlenecks that there's not much point trying to
> address bidi's bottlenecks until we start tackling the other ones.

Yes.  Basically, I claim that half of infinity is still infinity.

But the situation described by Dmitry does not belong to that class of
redisplay problem.