Angus M <anguscmelvi...@gmail.com> 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. >
That's because a) emacs is single-threaded and b) babel blocks are executed synchronously. emacs waits for the code block to finish executing before going on with its business. See e.g. the thread at http://article.gmane.org/gmane.emacs.orgmode/83704 > 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. > > Do I just have to accept that long code blocks can't be entered into Org > Mode? > Now I'm confused: are you executing the code block or aren't you? IIUC, code blocks can be of arbitrary length: but if you try to run one, you gotta wait till it finishes. Is that what you are complaining about or do you see something else? > Any help would be appreciated. I am running Org Mode (version 8.2.10) on > Windows 8. > Nick
