Re: fast list

[James Cloos <cloos@jhcloos.com>]

>>>>> "LMI" == Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

LMI> What do you mean by "20k vs 2k"?  The amount of data returned would be
LMI> the same, anyway, wouldn't it?

20000 groups vs 2000 groups.

The amount of data is the same, it just takes longer to grab it one
group at a time than all at once.  Part of the extra delay is the extra
round trips.  Part of it is that scanning the tables and indices for
one group takes nearly as long as scanning them for all of the groups.

Even if I create a sql fucntion which grabs the list of groups (the
UIDVALIDITY values in IMAP) and then iterates through that list one
UIDVALIDITY at a time, grabbing that groups data, it still takes on
the order of 20ms per group.  But grabbing all of that data at once
takes something like 25µs per group.

I did get working list-status support added to my dbmail.  I now want
to add a TAGS return type to list all of the tags, too.

I think I can follow you new nnimap well enough to propose a patch to
use list-status and list-tags.  (I prefer C or Perl, am far from
illiterate in lisp, but the old nnimap.el/imap.el bested me when I
tried to debug the two or three non-speed-related bugs which I hit.)

-JimC
-- 
James Cloos <cloos@jhcloos.com>         OpenPGP: 1024D/ED7DAEA6