From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: Scanning for duplicate IDs of whole buffer when exporting a
 sub-heading
Date: Thu, 11 Feb 2016 00:04:56 +0100
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In-Reply-To: <2016-02-10T19-04-29@devnull.Karl-Voit.at> (Karl Voit's message
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To: Karl Voit <devnull@Karl-Voit.at>
Cc: Karl Voit <news1142@Karl-Voit.at>, emacs-orgmode@gnu.org

Hello,

Karl Voit <devnull@Karl-Voit.at> writes:

>> Does your large file contain some [[id:...]] link? 
>
> Yes.
>
>> Does the sub-heading contains any?
>
> No.
>
>>> This takes very long on my i5 machine, roughly ten minutes. During
>>> this scan, I can't use Emacs any more because it's blocking of
>>> course.
>>
>> Even when using asynchronous export?
>
> Yes.
>
> I am on maint, 75ee067410abf0ebab77b1b05d7dcfe2ddf53f4d.

As Samuel pointed out, this was fixed in master some time ago. 

Meanwhile you could, as a hack, remove all [[id:...]] links from your
document with a function in `org-export-before-processing-hook'.

Regards,

-- 
Nicolas Goaziou