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Subject: Re: nnimap question
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On Wed, 16 Jan 2002, Vladimir Volovich wrote:

> Hi!
> 
> when i run gnus-group-get-new-news (g) from the *Group* buffer,
> nnimap spemds a lot of time checking mailboxes: i see
> nnimap: Checking mailbox <mailbox_name>
> in the minibuffer for each of my nnimap mailbox,
> even when there are no new messages.
> 
> if it possible to avoid checking nnimap mailboxes for
> gnus-group-get-new-news (or do it only on gnus startup)?

It would be possible, but then nnimap wouldn't notice when you get new 
mail in those groups.   Some people seems to only receive mail in one 
mailbox, and in this case it could be good to make this optimisation.  But 
when I started implementing it, I remember client-side splitting, which 
would break this...  maybe the client-side splitting in nnimap can update 
it's internal state of which groups have new mail though.

I have also thought about doing this asynchronously in the background, so 
that `g' returns immediately, but with possible old data.

Using the STATUS command instead of entering the group could be possible
as well.  It could record the UIDNEXT value and only enter the group (to
get highest/lowest article number) if it has changed.  Then it could cache
highest/lowest article number for groups.  This would work and have no bad
side effects, I think.

There is plenty of room for making things faster, at least...