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From: Simon Josefsson <jas@extundo.com>
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Subject: Re: nnimap again.
Date: Thu, 30 May 2002 14:38:11 +0200
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Stian Grytoyr <stian@grytoyr.net> writes:

> Foo <Foo4You@hotmail.com> writes:
>
> |  Now I just have to figure out why sorting/displaying a
> |  few thousand messages takes ages with my current config
> |  compared to other newsreaders :).
>
> If your server is running Courier-IMAP, I'm pretty sure you
> will see a dramatic speed increase if you set
> (nnimap-nov-is-evil) in the nnimap config. This is because
> nnimap issues UID SEARCH UID <uid> for every message you
> want to look at, and that makes Courier open _every_ message
> in the folder. Needless to say, this can take something like
> forever in a big mailbox with thousands of messages.
>
> For me, this simple setting increased the speed by several
> hundred percent, especially in the larger mailboxes. 

For everyones information: In Oort Gnus this is the default, and the
Gnus Agent NOV cache is used instead.