From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastien Vauban Subject: Re: long code blocks making Org Mode very slow Date: Tue, 14 Jul 2015 21:41:07 +0200 Message-ID: <86bnfebk8c.fsf@example.com> References: Mime-Version: 1.0 Content-Type: text/plain Return-path: List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org-mXXj517/zsQ@public.gmane.org Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org-mXXj517/zsQ@public.gmane.org To: emacs-orgmode-mXXj517/zsQ@public.gmane.org Angus M writes: > I'm trying to run a long Python code block (~4000 lines) in org mode. The > code is sandwiched between: > #+begin_src python > > #+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