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Re: slow `B m' due to a require for each of gnus-active-hashtb

From: P. Paolini
Subject: Re: slow `B m' due to a require for each of gnus-active-hashtb
Date: Wed, 10 Aug 2016 17:43:55 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux)

Kevin Brubeck Unhammer <> writes:

> Hi,
> On Gnus v5.13, Emacs 24.5.1, doing `B m` takes quite a long time (10s
> and up) before it shows any prompt (but seemingly only after I've been
> using Emacs for a while). If I toggle-debug-on-quit and poormansprofile
> it a bit, the backtraces always look like this:
> Debugger entered--Lisp error: (quit)
>   require(nntp)
>   gnus-get-function((nntp "") request-accept-article t)
>   gnus-valid-move-group-p(nntp+news\.gwene\.org:gwene\.net\.patdavid\.gimp)
>   #[(symbol) " !\205 \nB\211\207" [predicate symbol out]
> 2](nntp+news\.gwene\.org:gwene\.net\.patdavid\.gimp)
>   mapatoms(#[(symbol) " !\205 \nB\211\207" [predicate symbol out]
> 2]
> [nntp+news\.gmane\.org:gmane\.comp\.storage\.spectrum-scale\.gpfs\.user
> ...])
>   gnus-remove-if-not(gnus-valid-move-group-p
> [nntp+news\.gmane\.org:gmane\.comp\.storage\.spectrum-scale\.gpfs\.user
> ...] t)
>   gnus-read-move-group-name("Move" "nnimap+fmmbsync:Junk Mail" (397)
> "nnimap+trigram:")
>   gnus-summary-move-article(nil)
>   call-interactively(gnus-summary-move-article nil nil)
>   command-execute(gnus-summary-move-article)
> It's a lot faster if I simply comment out (require (car method)) from
> gnus-get-function (the require seems to still be there in git). If
> that's not safe (how many backend methods are there?), then perhaps
> there could be an alternate active group storage that organises active
> groups hierarchically, so it would be possible to go from
> valid-move-group to a set of groups?

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