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From: Eric Abrahamsen <eric@ericabrahamsen.net>
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Subject: Re: is nnmaildir very slow?
Date: Thu, 16 May 2019 09:22:45 -0700
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Eric S Fraga <e.fraga@ucl.ac.uk> writes:

> Hello all,
>
> For a number of reasons, I have settled on nnmaildir for my main group
> server.  Unfortunately, however, it seems to be very slow at the initial
> scan, taking up to several minutes within the gnus-request-scan function
> (I added some gnus-message lines in gnus-int.el).  I haven't figured out
> yet why it is so slow.  
>
> Does anybody else use maildir and see this?
>
> I am using emacs from git, updated yesterday.  The group that takes
> several minutes to scan has 8000 emails in it.

Is it only the initial scan that's that slow? I'd expect that once the
NOV files are generated, opening the groups would be pretty quick. Is
that true?