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From: "Bjørn Mork" <bmork@dod.no>
Subject: Re: Slow nnimap expiry with expiry-target
Date: Mon, 06 Oct 2003 14:11:00 +0200	[thread overview]
Message-ID: <hv4qympnvv.fsf@rasputin.ws.nextra.no> (raw)
In-Reply-To: <iluy8wfmtxv.fsf@latte.josefsson.org>

Simon Josefsson <jas@extundo.com> writes:

> I think the problem may be because the Gnus backend interface doesn't
> include a 'move' command.  It only has retrieve + append.  Nnimap at
> least optimize the append operation into copy, but it cannot optimize
> away the retrieve.

Don't think so.  The problem seems to be in nnimap-expiry-target,
which include a 
 (dolist (art arts)
   (nnimap-request-article art group server (current-buffer)) 
   ...
 )
where arts is a list of messages to expire.

This is necessary if the target is a function or another backend, but
could be optimized away when the target is a folder on the same imap
server.  How about something like this (which is already there in
nnimap.el but in the wrong place):

(defun nnimap-expiry-target (arts group server)
  (unless (eq nnmail-expiry-target 'delete)
    (if (and (not (functionp nnmail-expiry-target)) 
	     (gnus-server-equal (gnus-group-method nnmail-expiry-target) 
				(gnus-server-to-method 
				 (format "nnimap:%s" server))))
	;; moving article within same server, speed it up...
	(and (nnimap-possibly-change-group group)
	     (imap-message-copy (imap-range-to-message-set arts)
				(gnus-group-short-name nnmail-expiry-target) 
				'dontcreate nil nnimap-server-buffer))
      (with-temp-buffer
	(dolist (art arts)
	  (nnimap-request-article art group server (current-buffer))
	  ;; hints for optimization in `nnimap-request-accept-article'
	  (let ((nnimap-current-move-article art)
		(nnimap-current-move-group group)
		(nnimap-current-move-server server))
	    (nnmail-expiry-target-group nnmail-expiry-target group)))))
    ;; It is not clear if `nnmail-expiry-target' somehow cause the
    ;; current group to be changed or not, so we make sure here.
    (nnimap-possibly-change-group group server)))

> Fixing it would be nice.  Too bad I keep buying faster machines,
> otherwise I probably would be inclined to work on it.

Hey, no problem.  I can donate a 486 if you pay the postage :-)


Bjørn
-- 
So, trees are malignant?  



  parent reply	other threads:[~2003-10-06 12:11 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-09-23 12:34 Bjørn Mork
2003-09-23 14:59 ` Simon Josefsson
2003-09-23 17:37   ` Zack Weinberg
2003-09-23 18:11     ` Simon Josefsson
2003-09-23 19:41       ` Zack Weinberg
2003-09-23 19:56         ` Simon Josefsson
2003-09-23 19:59           ` Simon Josefsson
2003-09-23 20:41             ` Jochen Küpper
2003-09-23 20:56               ` Simon Josefsson
2003-09-24 10:42               ` Ted Zlatanov
2003-09-25 14:40                 ` Reiner Steib
2003-09-25 17:54                   ` Simon Josefsson
2003-09-26  2:57                     ` Jesper Harder
2003-10-04 22:10           ` Adding "move" operation to Gnus backends (Was: Slow nnimap...) Steinar Bang
2003-10-10  3:05             ` Adding "move" operation to Gnus backends Jesper Harder
2003-10-06 12:11   ` Bjørn Mork [this message]
2003-10-06 17:58     ` Slow nnimap expiry with expiry-target Simon Josefsson

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