GNU bug report logs - #50877
28.0.50; Gnus: nnimap backend is extremely slow to initialise new groups

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eric Abrahamsen <eric <at> ericabrahamsen.net>
Cc: 50877 <at> debbugs.gnu.org, Morgan Willcock <mwillcock <at> precedence.co.uk>, Stefan Kangas <stefankangas <at> gmail.com>
Subject: bug#50877: 28.0.50; Gnus: nnimap backend is extremely slow to initialise new groups
Date: Wed, 29 Sep 2021 08:18:06 +0200

Eric Abrahamsen <eric <at> ericabrahamsen.net> writes:

> I'm cc'ing Lars and Stefan Kangas, who are the most "involved" here. The
> benchmarks are gruesome:

Yeah, sounds like that commit has to be reverted.

> Probably still worth a dedicated function for Gnus? (Or a rewrite of
> `seq-difference'...)

Rewriting it using the same trick that the Gnus version does (i.e., a
hash table) might be nice, but it does use more memory, so I'm not sure
that's a general solution.  Perhaps there should be a separate version
of seq-difference.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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