Re: bug#9610: 24.0.90; org-mode: sluggish response and high CPU utilization with large .org files

[Eric S Fraga <e.fraga@ucl.ac.uk>]

Lawrence Mitchell <wence@gmx.li> writes:

> Steve Revilak wrote:
>
>>>> I'd like to report an org-mode regression issue.  When working with
>>>> large .org files, Emacs 24.0.90 becomes sluggish, and consumes large
>>>> amounts of CPU.
>
>>> If you type this:
>
>>>  M-x set-variable RET bidi-paragraph-direction RET left-to-right RET
>
>>> does the problem go away?
>
>> My bug report contained two scenarios to produce sluggish response and
>> high CPU utilization.  These scenarios were
>
>>  (1) move point to the end of buffer, and start typing
>
>>  (2) Put point in line 1, column zero; press and hold the down (then up)
>>  arrows to move point down (then up) the org-mode buffer.
>
>> Setting bidi-paragraph-direction: left-to-right eliminates the problem
>> with scenario (1).  However, it has no effect on scenario (2).
>
> Setting bidi-display-reordering to nil in the buffer has the
> effect that moving point is no longer jerky for me.

Brilliant!  I have been getting rather annoyed at the jerky movement in
a number of buffers, mostly org, but I knew the problem wasn't due to
org having done timings etc.  Setting this to nil does the job.

What do you recommend is the best way to handle this: in org-mode-hook
for instance?

thanks,
eric

-- 
: Eric S Fraga (GnuPG: 0xC89193D8FFFCF67D) in Emacs 24.0.50.1
: using Org-mode version 7.7 (release_7.7.328.g1a97)