Re: [O] long code blocks making Org Mode very slow

[Sebastien Vauban]

Angus M <address@hidden> writes:
> I'm trying to run a long Python code block (~4000 lines) in org mode.  The
> code is sandwiched between:
> #+begin_src python
> <python code block>
> #+end_src
>
> It runs fine, but org mode becomes incredibly slow - when typing text there
> is about a 10 second delay before the character appears on the screen.  If I
> reduce the number of lines of code in the block there is a noticeable
> increase in speed.
>
> I am not using line numbers, and the delay is not ameliorated by turning off
> fontification.
>
> If I add a semi-colon before #+begin_src, to comment it off (get rid of src
> environment), then org mode returns to it's normal speed.

The best thing to do, now, is run the profiler:

M-x profiler-start
... type one character (which takes 10 s to be rendered)
M-x profiler-report

Best regards,
  Seb

-- 
Sebastien Vauban