Re: [O] Org mode in combination with emacs follow-mode is terrible

[Joost Kremers]

On Wed, Jun 13 2018, Eric S Fraga wrote:
> On Wednesday, 13 Jun 2018 at 09:53, Gerald Wildgruber wrote:
> > Switching to text-mode, with 5 windows and follow-mode still 
> > being
> > active reduces lag significantly.
> >
> > So there must be an issue specifically with the combination of 
> > org-mode
> > and follow-mode!
>
> I don't think there's an issue per se in the sense of bugs.  Org 
> does
> much more processing of the text than does text mode so if you 
> have 60k
> worth of text to process each time you type something, it's 
> probably not
> surprising that there is a lag.

Actually, I would suspect it's more of a problem for follow-mode 
than org-mode, because follow-mode needs to keep the different 
windows in sync. For this, it adds a function to 
`post-command-hook', which means it's run after every key press.

It's not inconceivable that `follow-mode' does something that is 
extra time-consuming in an Org buffer. To find out what that might 
be, you could try the Elisp profiler that comes with Emacs. See 
the section "Profiling" in the Elisp manual for details.

Once you've found out which function(s) consume so much time, it 
might be possible to ask in here or on emacs-devel what exactly is 
causing the problem and whether there's a way around it.

--
Joost Kremers
Life has its moments