From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thierry Banel <tbanelwebmin@free.fr>
Subject: Re: speeding up Babel Gnuplot
Date: Mon, 02 Jan 2017 21:11:07 +0100
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	<87d1g6qrqh.fsf@nicolasgoaziou.fr>
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To: "emacs-orgmode@gnu.org >> Org Mode" <emacs-orgmode@gnu.org>

Le 02/01/2017 00:34, Nicolas Goaziou a =E9crit :
> Hello,
>
> Thierry Banel <tbanelwebmin@free.fr> writes:
>
>> 1. Temporary generated twice
>> Because org-babel-gnuplot-process-vars is called twice.
>>
>> There is no obvious fix. Here is a dirty patch. It caches the name of
>> the temporary file in the 'param' list.
> This may not be an issue if `orgtbl-to-generic' is sufficiently fast.

I will look further into that.

>> 2. Quadratic behavior
>> The spot is at ox.el::5119(the lambda in org-export-table-row-number).
>>
>> This lambda is called a number of times equal to the square of thesize
>> of the table being plotted. For a 2000 rows table, this is
>> 2000x2000 =3D four millions times. The cache a few lines before does
>> nothelp because each row is visited only once.
> Fixed. Thank you.
>
> I also optimized a bit more `orgtbl-to-generic'. Hopefully, Babel
> Gnuplot should be responsive again of large tables.
>
Great improvement!
So,filling the org-export-table-row-numbercache at once was the way to go=
.

Thanks