Re: org-src-fontify-natively makes things very, very slow

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

Carsten Dominik <carsten.dominik@gmail.com> writes:

> On 21.3.2011, at 18:06, Eric S Fraga wrote:
>
>> Hello again,
>> 
>> going back to the original subject of this thread (although thanks all
>> for your inputs on yasnippet ;-), I have started working on a new
>> document and am finding the slowdown of navigation (next-line) very
>> annoying.  In this document, I have two gnuplot source blocks.
>> Navigating through them, I get the following results from elp:

[...]

>> From these timings, the font locking doesn't seem to be the issue but
>> maybe the overlays are.  However, commenting out the code that Sébastien
>> Vauban indicated:
>> 
>>> Maybe this is (partly?) due to the overlay I added:
>>> 
>>> #+begin_src emacs-lisp
>>>                (overlay-put (make-overlay beg1 block-end)
>>>                             'face 'org-block-background))
>>> #+end_src
>> 
>> (well, commenting out the whole condition that includes this code) makes
>> no difference at all.
>
> Did you restart Emacs?  Because if you just continued, all those
> overlays are there already.

I cannot remember.  Sorry.

>> So, I turned off =org-src-fontify-natively= and things are back to
>> normal: next-line is as fast as previous-line.  I can put up without the
>> fontification so this is what I am doing now.  
>> 
>> However, as it's a pity to lose the native fontification, it would be
>> nice to solve this problem in another way.  Can anybody suggest any
>> other thing to try?
>
> The problem with the multiple overlays that were created
> during native fontification is now fixed.  I would be interested
> to know if this improves the situation.
>
> - Carsten
>

Thanks.  I've re-enabled =org-src-fontify-natively= and will let you
know how I get on!

-- 
: Eric S Fraga (GnuPG: 0xC89193D8FFFCF67D) in Emacs 24.0.50.1
: using Org-mode version 7.5 (release_7.5.225.gbfdc9.dirty)