From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: speeding up Babel Gnuplot
Date: Wed, 4 Jan 2017 15:15:37 -0800
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To: Achim Gratz <Stromeko@nexgo.de>
Cc: emacs-orgmode@gnu.org

On Wed, 4 Jan 2017, Achim Gratz wrote:

> Thierry Banel writes:
>> There is no way to ensure a single call to
>> (org-babel-gnuplot-process-vars) without modifying ob-core.el. I don't
>> want to do that because I would have to change a lot of babel backends.
>
> But that is the right fix to apply, unless there is a reason for the
> input vars to be processed multiple times.  I haven't looked at the
> Babel code in the last two years, but generally I'd suggest that each
> argument should only be processed once per Babel block since the second
> processing could have unwanted side-effects.
>

I'm late to this party, but AFAICS input vars are processed just once.

Running this:

#+BEGIN_SRC emacs-lisp :var a=(setq runvar (+ 1 runvar))
a
#+END_SRC

increments runvar by one each time it is run.

So this seems not to be a general babel issue.

??

Chuck