From: Tassilo Horn <tassilo@member.fsf.org>
To: Miles Bader <miles@gnu.org>
Cc: Jashy <nanjunjie@gmail.com>, Emacs-devel@gnu.org
Subject: Re: Using the ImageMagick backend seems to leak memory
Date: Fri, 07 Jan 2011 09:28:12 +0100 [thread overview]
Message-ID: <874o9l86eb.fsf@member.fsf.org> (raw)
In-Reply-To: <buok4ihwbp9.fsf@dhlpc061.dev.necel.com> (Miles Bader's message of "Fri, 07 Jan 2011 13:59:46 +0900")
Miles Bader <miles@gnu.org> writes:
>>> I just noticed that my emacs uses up more than a gigabyte memory.
>>> It is because of doc-view with ImageMagick backend.
>>>
>> I met same issue.
>
> My impression is that in general, ImageMagick does not aim at memory
> efficiency (that's why I don't want to use its libraries for my own
> image I/O needs, event though doing so would be pretty convenient).
Well, not being memory efficiency and not giving back memory at all is a
minor difference. ;-)
I've just opened a doc-view page-x.png with ImageMagick's display tool.
The behavior is identical, e.g., it reserves ~30MB per PNG and only
gives back memory when I close the program. So I presume, ImageMagick
has some cache that gets at least cleared when the process is killed.
I'm sure, there's some C function you can call to clear it...
Looking at the API, there's
--8<---------------cut here---------------start------------->8---
ClearMagickWand() clears resources associated with the wand.
The format of the ClearMagickWand method is:
void ClearMagickWand(MagickWand *wand)
A description of each parameter follows:
wand
the magick wand.
--8<---------------cut here---------------end--------------->8---
In the emacs sources, that function's never called. So that's probably
the source of the leak.
Bye,
Tassilo
next prev parent reply other threads:[~2011-01-07 8:28 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-06 7:51 Using the ImageMagick backend seems to leak memory Tassilo Horn
2011-01-06 9:02 ` joakim
2011-01-06 10:20 ` Tassilo Horn
2011-01-07 4:17 ` Jashy
2011-01-07 4:59 ` Miles Bader
2011-01-07 6:27 ` Stephen J. Turnbull
2011-01-07 7:25 ` Miles Bader
2011-01-07 8:28 ` Tassilo Horn [this message]
2011-01-07 22:39 ` Andreas Schwab
2011-01-10 10:34 ` Tassilo Horn
2011-01-10 13:28 ` Jashy
2011-01-10 13:56 ` Tassilo Horn
2011-01-10 14:36 ` Jashy
2011-01-11 10:14 ` Jashy
2011-01-11 10:59 ` joakim
2011-01-11 14:17 ` joakim
2011-01-11 14:38 ` joakim
2011-01-11 17:43 ` Tassilo Horn
2011-01-11 18:11 ` joakim
2011-01-11 19:10 ` Tassilo Horn
2011-01-11 19:35 ` joakim
2011-01-11 19:55 ` Tassilo Horn
2011-01-12 1:47 ` Stefan Monnier
2011-01-12 7:37 ` Tassilo Horn
2011-01-10 21:47 ` Tassilo Horn
2011-01-11 8:47 ` Tassilo Horn
2011-01-11 9:35 ` joakim
2011-01-11 9:53 ` Tassilo Horn
2011-01-11 9:54 ` joakim
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