From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: Tangling takes long - profiling and calling R
Date: Mon, 15 Jun 2015 11:52:55 -0700
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To: Rainer M Krug <Rainer@krugs.de>
Cc: emacs-orgmode@gnu.org

On Mon, 15 Jun 2015, Rainer M Krug wrote:

> Hi
>
> I have a relatively large file with
> about 200 =source blocks (R) to be tangled to get an R package. But the
> tangling takes about 20 seconds.
>
> Profiling the tangling showed that the call to ~mapcar~ in
> ~org-babel-params-from-properties~ takes about 40% of the execution time
> (see profiler excerpt below). Is there anything one can do to make this
> faster?
>
> In addition to this, I observed there is some interaction with ESS when
> tangling, which in my understanding is not necessary. I get messages
> like
>
> ,----
> | ...
> | Wrote /Users/rainerkrug/Documents/Projects/EnergyBalance/.Rbuildignore
> | Wrote /Users/rainerkrug/Documents/Projects/EnergyBalance/tests/wpLELTest.R
> | You are developing: (EnergyBalance)
> | Wrote /Users/rainerkrug/Documents/Projects/EnergyBalance/R/plotwpLELFitListParDistr.R
> | You are developing: (EnergyBalance)
> | ...
> `----
>
> where the messages "You are developing: (EnergyBalance)" come from
> ESS. Is this to be expected that R is called for some blocks, but not
> for others, when tangling?

The major mode is invoked when tangling, if possible.

This enables comments to be rendered. See the docstring for 
`org-babel-spec-to-string'.

HTH,

Chuck