From: David De La Harpe Golden <david@harpegolden.net>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: acm@muc.de, Eli Zaretskii <eliz@gnu.org>,
Lennart Borgman <lennart.borgman@gmail.com>,
emacs-devel@gnu.org
Subject: Re: Emacs 23.0 is much slower starting than Emacs 22.3
Date: Fri, 24 Oct 2008 16:19:35 +0100 [thread overview]
Message-ID: <4901E787.40504@harpegolden.net> (raw)
In-Reply-To: <jwviqrivdkh.fsf-monnier+emacs@gnu.org>
Stefan Monnier wrote:
>> Most of the latter is in "hack-project-variables", and most of /that/ is
>> "project-find-settings-file", and most of that is the
>> "locate-dominating-file" walk.
>
> locate-dominating-file (or rather some equivalent code) is also used in
> VC to detect the revision control system used for the file.
> It's actually used 5 times there (once each for Bzr Git Hg Mtn Arch), so
> are you sure only the one in project-find-settings-file costs us
> the slowdown?
Not all of it, but it seems to be significant.
taking out locate-dominating-file with:
(defun locate-dominating-file (file regexp) nil)
runs just now (one after the other, no reboot, so probably
from OS cache anyway)
emacs l-d-f realtime
22 n/a 4.921
23 off 6.188
23 on 7.500
Taking out hack-project-variables as a whole similarly
emacs h-p-v realtime
23 off 6.079
So it's about 1/2 the slowdown?
Then I set vc-handled-backends to nil (not sure that stops
vc searching totally, mind):
emacs vc-h-b h-p-v realtime
23 off off 5.503
23 off on 7.189
next prev parent reply other threads:[~2008-10-24 15:19 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-22 9:11 Emacs 23.0 is much slower starting than Emacs 22.3 Alan Mackenzie
2008-10-22 13:23 ` Stefan Monnier
2008-10-22 13:55 ` John covici
2008-10-22 15:14 ` Alan Mackenzie
2008-10-22 16:46 ` David De La Harpe Golden
2008-10-22 21:12 ` Alan Mackenzie
2008-10-22 21:19 ` Eli Zaretskii
2008-10-23 9:21 ` Alan Mackenzie
2008-10-23 21:53 ` Eli Zaretskii
2008-10-23 6:53 ` David De La Harpe Golden
2008-10-23 9:09 ` Alan Mackenzie
2008-10-23 16:57 ` David De La Harpe Golden
2008-10-23 21:52 ` Eli Zaretskii
2008-10-23 22:33 ` Lennart Borgman
2008-10-24 9:26 ` Eli Zaretskii
2008-10-23 22:47 ` David De La Harpe Golden
2008-10-23 23:12 ` Lennart Borgman
2008-10-23 23:54 ` Lennart Borgman
2008-10-24 9:51 ` Eli Zaretskii
2008-10-24 13:58 ` David De La Harpe Golden
2008-10-24 15:44 ` Lennart Borgman
2008-10-24 16:24 ` Chong Yidong
2008-10-24 16:48 ` Eli Zaretskii
2008-10-24 16:45 ` David De La Harpe Golden
2008-10-24 16:53 ` Eli Zaretskii
2008-10-25 2:01 ` Richard M. Stallman
2008-10-25 3:38 ` David De La Harpe Golden
2008-10-24 0:13 ` David De La Harpe Golden
2008-10-24 0:59 ` Lennart Borgman
2008-10-24 1:58 ` David De La Harpe Golden
2008-10-24 1:44 ` David De La Harpe Golden
2008-10-24 9:57 ` Eli Zaretskii
2008-10-24 15:00 ` David De La Harpe Golden
2008-10-24 11:21 ` Alan Mackenzie
2008-10-24 14:32 ` David De La Harpe Golden
2008-10-24 19:28 ` Alan Mackenzie
2008-10-24 19:35 ` David De La Harpe Golden
2008-10-24 4:13 ` Stefan Monnier
2008-10-24 15:19 ` David De La Harpe Golden [this message]
2008-10-24 18:42 ` Stefan Monnier
2008-10-24 19:36 ` David De La Harpe Golden
2008-10-24 23:44 ` David De La Harpe Golden
2008-10-25 15:19 ` Stefan Monnier
2008-10-25 17:02 ` David De La Harpe Golden
2008-10-24 9:52 ` Eli Zaretskii
2008-10-24 9:35 ` Eli Zaretskii
2008-10-24 9:30 ` Eli Zaretskii
2008-10-23 1:29 ` Miles Bader
2008-10-23 9:06 ` Alan Mackenzie
2008-10-22 18:26 ` Eli Zaretskii
2008-10-22 21:40 ` Alan Mackenzie
2008-10-22 22:09 ` Eli Zaretskii
2008-10-22 21:02 ` Richard M. Stallman
2008-10-24 11:59 ` Emacs 23.0 is much slower than Emacs 22.3. Maybe it's the garbage collector Alan Mackenzie
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