From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: another example of org being slow, with some analysis
Date: Fri, 19 Jun 2015 09:37:23 +0200
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	(Daniel Bausch's message of "Fri, 19 Jun 2015 08:19:14 +0200")
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To: Daniel Bausch <bausch@dvs.tu-darmstadt.de>
Cc: Nick Dokos <ndokos@gmail.com>, emacs-orgmode@gnu.org

Hello,

Daniel Bausch <bausch@dvs.tu-darmstadt.de> writes:

> Line 6000 is indeed quite "lame".  I have similar problems like Eric.  A
> table recalculation at line 43868 takes about a minute at my quite fast
> machine.  I also tracked that down to org-current-line.  One interesting
> detail is that this depends on the buffer encoding.  With ASCII the
> recalculation takes less than a second, with utf-8 about a minute.
>
> I think it actually is not an org-mode problem but depends on how
> (count-lines 1 (point)) works, as it is using regex searches for the
> line endings.  I can imagine that the regex parser for utf-8 can be
> inefficient.

Actually `org-count-lines' and `org-goto-line' are inefficient
functions. Unfortunately, Org Table overuses the latter. Functions
calling it should be refactored to use, e.g., `goto-char' instead.

However, this might require some deep changes in the library.


Regards,

-- 
Nicolas Goaziou