* [babel] python session speed vs non session
@ 2010-09-05 5:37 Seth Burleigh
2010-09-07 22:41 ` Eric Schulte
0 siblings, 1 reply; 2+ messages in thread
From: Seth Burleigh @ 2010-09-05 5:37 UTC (permalink / raw)
To: emacs-orgmode
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I have recently been trying out the src executing capabilities of orgmode. I
have been confused why a python session takes significantly longer to
execute than a non python session. For example
#+begin_src python
return 2+2
#+end_src
executes pretty quickly, but
#+begin_src python :session test
2+2
#+end_src
executes twice as long. Looking at the command shell for python, it seems
that the time is being taken to actually send the source to the command
shell buffer. Once its sent (or once i can see it displayed in the command
shell buffer) it immediately returns. Any ideas?
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* Re: [babel] python session speed vs non session
2010-09-05 5:37 [babel] python session speed vs non session Seth Burleigh
@ 2010-09-07 22:41 ` Eric Schulte
0 siblings, 0 replies; 2+ messages in thread
From: Eric Schulte @ 2010-09-07 22:41 UTC (permalink / raw)
To: Seth Burleigh; +Cc: emacs-orgmode
Hi Seth,
This is probably a combination of both the use of comint-mode which
indirects interaction with the python process through a temporary Emacs
buffer, in combination with the fact that Emacs must explicitly wait for
the interactive python process to return output until a special
"end-of-output" string has been received.
Dan has recently changed the session based evaluation for R to use a
different technique which doesn't require these explicit checks for an
"end-of-output" string which results in less clutter for the session
buffer and /potentially/ faster evaluation. I would like to look at the
possibility of converting some other languages to this new schema.
Sorry I can't point to a clear culprit. Best -- Eric
Seth Burleigh <wburle@gmail.com> writes:
> I have recently been trying out the src executing capabilities of orgmode. I
> have been confused why a python session takes significantly longer to
> execute than a non python session. For example
>
> #+begin_src python
> return 2+2
> #+end_src
>
> executes pretty quickly, but
> #+begin_src python :session test
> 2+2
> #+end_src
>
> executes twice as long. Looking at the command shell for python, it seems
> that the time is being taken to actually send the source to the command
> shell buffer. Once its sent (or once i can see it displayed in the command
> shell buffer) it immediately returns. Any ideas?
> _______________________________________________
> Emacs-orgmode mailing list
> Please use `Reply All' to send replies to the list.
> Emacs-orgmode@gnu.org
> http://lists.gnu.org/mailman/listinfo/emacs-orgmode
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