Re: Performance degradation from long lines

[Eli Zaretskii]

> From: Stefan Kangas <address@hidden>
> Date: Sat, 13 Jul 2019 11:07:08 +0200
> Cc: Phil Sainty <address@hidden>, address@hidden, 
>       Stefan Monnier <address@hidden>, address@hidden
> 
> Eli Zaretskii <address@hidden> writes:
> 
> > One comment I have is that disabling bidi-display-reordering should
> > probably be removed from the defaults, because doing so puts the
> > display engine in a state that is not being tested, and can cause
> > inconsistencies and even bugs (because some portions of the code were
> > written under the assumption that this variable is never nil).
> 
> I think some users are already setting bidi-display-reordering to nil.  I
> stumbled into this the other day, for example:

They do that at their own risk.

> Should Emacs support that?

If someone wants to work on that, they should feel free.  I won't.

> Should it be added to its doc string that it could be dangerous?

I'm okay with documenting that, thanks.  Although the variable was
supposed to be an internal on, but I guess that genie is out of the
bottle long ago.