How to speed up Image Magick on 2MB images (is *very* slow)

Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
Post Reply
louisdunne

How to speed up Image Magick on 2MB images (is *very* slow)

Post by louisdunne »

Hi all,

I'm using convert to create thumbnails for a web application, but the performance is killing us. It's taking 6 seconds on a relatively new linux box, and 15-30 seconds on a decent solaris box to create a single thumbnail from a 2MB image. The command I'm using is:

convert -size 1280x960 'img.jpg[0]' -auto-orient -thumbnail 640x480 -background transparent -gravity center -extent 640x480 ./img-640x480.jpg

Here's the output of identify -list resource:

identify -list resource
File Area Memory Map Disk
------------------------------------------------
192 4gb 3gb 8gb 16eb


Does this look ok?

I've played with the various XXX_LIMIT settings but nothing seems to help. I've run the above convert with "-debug all". Can anyone see anything obviously wrong here? I've pasted the debug output below.

What is embarresing here is that in Java using JAI we can create thumbnails for images like this in about a second on the same hardware.

The biggest jumps in timing in the debug output seems to be here:

2008-09-22T11:40:21+01:00 0:04 3.660u 6.4.1 Cache convert[4737]: cache.c/unknown/1928/Cache
memory => memory
2008-09-22T11:40:28+01:00 0:11 10.120u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][18x480+0+0]


Any ideas and suggestions would be gratefully received.


thanks
Louis
--

2008-09-22T11:40:18+01:00 0:01 0.010u 6.4.1 Configure convert[4737]: utility.c/unknown/809/Configure
Command line: /export/louisd/ifs/installed_libraries/osdir/bin/convert {-debug} {all} {-size} {1280x960} {dsc00492.jpg[0]} {-auto-orient} {-thumbnail} {640x480} {-background} {transparent} {-gravity} {center} {-extent} {640x480} {./dsc00492-640x480.jpg}
2008-09-22T11:40:18+01:00 0:01 0.010u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/config/coder.xml"
2008-09-22T11:40:18+01:00 0:01 0.010u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/lib/ImageMagick-6.4.1/config/coder.xml"
2008-09-22T11:40:18+01:00 0:01 0.010u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/doc/ImageMagick-6.4.1/coder.xml"
2008-09-22T11:40:18+01:00 0:01 0.010u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/coder.xml"
2008-09-22T11:40:18+01:00 0:01 0.010u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/home/louisd/.magick/coder.xml"
2008-09-22T11:40:18+01:00 0:01 0.010u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "coder.xml"
2008-09-22T11:40:18+01:00 0:01 0.010u 6.4.1 Configure convert[4737]: coder.c/unknown/634/Configure
Loading coder map "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/config/coder.xml" ...
2008-09-22T11:40:18+01:00 0:01 0.030u 6.4.1 Module convert[4737]: module.c/unknown/1077/Module
Searching for module "JPEG" using filename "jpeg.la"
2008-09-22T11:40:18+01:00 0:01 0.030u 6.4.1 Module convert[4737]: module.c/unknown/479/Module
Searching for coder module file "jpeg.la" ...
2008-09-22T11:40:18+01:00 0:01 0.030u 6.4.1 Module convert[4737]: module.c/unknown/1097/Module
Opening module at path "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/lib/
ImageMagick-6.4.1/modules-Q16/coders/jpeg.la"
2008-09-22T11:40:18+01:00 0:01 0.030u 6.4.1 Module convert[4737]: module.c/unknown/1131/Module
Method "RegisterJPEGImage" in module "JPEG" at address fedb5848
2008-09-22T11:40:18+01:00 0:01 0.030u 6.4.1 Module convert[4737]: module.c/unknown/1146/Module
Method "UnregisterJPEGImage" in module "JPEG" at address fedb59ac
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Blob convert[4737]: blob.c/unknown/2356/Blob
read 3 magic header bytes
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Cache convert[4737]: cache.c/unknown/2162/Cache
destroy
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Configure convert[4737]: configure.c
/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/config/magic.xml"
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/lib/ImageMagick-6.4.1/config/magic.xml"
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/doc/ImageMagick-6.4.1/magic.xml"
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/magic.xml"
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/home/louisd/.magick/magic.xml"
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "magic.xml"
2008-09-22T11:40:18+01:00 0:01 0.040u 6.4.1 Configure convert[4737]: magic.c/unknown/679/Configure
Loading magic map "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/config/magic.xml" ...
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Blob convert[4737]: blob.c/unknown/2356/Blob
read 3 magic header bytes
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Coder convert[4737]: jpeg.c/unknown/572/Coder
Profile: exif, 7674 bytes
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Coder convert[4737]: jpeg.c/unknown/765/Coder
Scale factor: 2
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Coder convert[4737]: jpeg.c/unknown/819/Coder
Interlace: nonprogressive
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Coder convert[4737]: jpeg.c/unknown/821/Coder
Data precision: 8
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Coder convert[4737]: jpeg.c/unknown/823/Coder
Geometry: 2848x2136
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Coder convert[4737]: jpeg.c/unknown/900/Coder
Quality: 97 (approximate)
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Coder convert[4737]: jpeg.c/unknown/996/Coder
Colorspace: RGB
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1023/Coder
Sampling Factors: 2x1,1x1,1x1
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Area: 46.4121mb/46.4121mb/4gb
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Memory: 46.4121mb/46.4121mb/3gb
2008-09-22T11:40:18+01:00 0:01 0.070u 6.4.1 Cache convert[4737]: cache.c/unknown/3525/Cache
open dsc00492.jpg[0] (anonymous memory, 2848x2136 46.4121mb)
2008-09-22T11:40:20+01:00 0:03 2.140u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Area: 58.5938mb/58.5938mb/4gb
2008-09-22T11:40:20+01:00 0:03 2.140u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Memory: 58.5938mb/105.006mb/3gb
2008-09-22T11:40:20+01:00 0:03 2.140u 6.4.1 Cache convert[4737]: cache.c/unknown/3525/Cache
open dsc00492.jpg[0] (anonymous memory, 3200x2400 58.5938mb)
2008-09-22T11:40:20+01:00 0:03 2.140u 6.4.1 Cache convert[4737]: cache.c/unknown/1928/Cache
memory => memory
2008-09-22T11:40:21+01:00 0:04 3.650u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Area: 2.34375mb/2.34375mb/4gb
2008-09-22T11:40:21+01:00 0:04 3.650u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Memory: 2.34375mb/107.35mb/3gb
2008-09-22T11:40:21+01:00 0:04 3.650u 6.4.1 Cache convert[4737]: cache.c/unknown/3525/Cache
open dsc00492.jpg[0] (anonymous memory, 640x480 2.34375mb)
2008-09-22T11:40:21+01:00 0:04 3.650u 6.4.1 Cache convert[4737]: cache.c/unknown/1928/Cache
memory => memory
2008-09-22T11:40:21+01:00 0:04 3.660u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Area: 11.7188mb/11.7188mb/4gb
2008-09-22T11:40:21+01:00 0:04 3.660u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Memory: 11.7188mb/119.068mb/3gb
2008-09-22T11:40:21+01:00 0:04 3.660u 6.4.1 Cache convert[4737]: cache.c/unknown/3525/Cache
open dsc00492.jpg[0] (anonymous memory, 3200x480 11.7188mb)
2008-09-22T11:40:21+01:00 0:04 3.660u 6.4.1 Cache convert[4737]: cache.c/unknown/1928/Cache
memory => memory
2008-09-22T11:40:28+01:00 0:11 10.120u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][18x480+0+0]
2008-09-22T11:40:28+01:00 0:11 10.130u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+0+0]
2008-09-22T11:40:28+01:00 0:11 10.130u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][23x480+0+0]
2008-09-22T11:40:28+01:00 0:11 10.130u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+1+0]
2008-09-22T11:40:28+01:00 0:11 10.130u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][28x480+0+0]
2008-09-22T11:40:28+01:00 0:11 10.130u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+2+0]
2008-09-22T11:40:28+01:00 0:11 10.130u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][31x480+2+0]
2008-09-22T11:40:28+01:00 0:11 10.140u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+4+0]
2008-09-22T11:40:28+01:00 0:11 10.150u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+8+0]
2008-09-22T11:40:28+01:00 0:11 10.150u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][31x480+32+0]
2008-09-22T11:40:28+01:00 0:11 10.170u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+16+0]
2008-09-22T11:40:28+01:00 0:11 10.210u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+32+0]
2008-09-22T11:40:28+01:00 0:11 10.290u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+64+0]
2008-09-22T11:40:28+01:00 0:11 10.390u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][31x480+512+0]
2008-09-22T11:40:28+01:00 0:11 10.440u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+128+0]
2008-09-22T11:40:28+01:00 0:11 10.690u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][31x480+1152+0]
2008-09-22T11:40:28+01:00 0:11 10.750u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+256+0]
2008-09-22T11:40:29+01:00 0:12 11.010u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][31x480+1792+0]
2008-09-22T11:40:29+01:00 0:12 11.050u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+384+0]
2008-09-22T11:40:29+01:00 0:12 11.310u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][31x480+2432+0]
2008-09-22T11:40:29+01:00 0:12 11.360u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+512+0]
2008-09-22T11:40:29+01:00 0:12 11.610u 6.4.1 Cache convert[4737]: cache.c/unknown/3970/Cache
dsc00492.jpg[0][31x480+3072+0]
2008-09-22T11:40:29+01:00 0:12 11.670u 6.4.1 Cache convert[4737]: cache.c/unknown/4885/Cache
dsc00492.jpg[0][1x480+639+0]
2008-09-22T11:40:29+01:00 0:12 11.680u 6.4.1 Resource convert[4737]: resource.c/unknown/834/Resource
Memory: 11.7188mb/107.35mb/3gb
2008-09-22T11:40:29+01:00 0:12 11.680u 6.4.1 Cache convert[4737]: cache.c/unknown/2162/Cache
destroy dsc00492.jpg[0]
2008-09-22T11:40:29+01:00 0:12 11.740u 6.4.1 Resource convert[4737]: resource.c/unknown/834/Resource
Memory: 58.5938mb/48.7559mb/3gb
2008-09-22T11:40:29+01:00 0:12 11.740u 6.4.1 Cache convert[4737]: cache.c/unknown/2162/Cache
destroy dsc00492.jpg[0]
2008-09-22T11:40:29+01:00 0:12 11.880u 6.4.1 Resource convert[4737]: resource.c/unknown/834/Resource
Memory: 46.4121mb/2.34375mb/3gb
2008-09-22T11:40:29+01:00 0:12 11.880u 6.4.1 Cache convert[4737]: cache.c/unknown/2162/Cache
destroy dsc00492.jpg[0]
2008-09-22T11:40:29+01:00 0:12 11.880u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/config/colors.xml"
2008-09-22T11:40:29+01:00 0:12 11.880u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/lib/ImageMagick-6.4.1/config/colors.xml"
2008-09-22T11:40:29+01:00 0:12 11.880u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/doc/ImageMagick-6.4.1/colors.xml"
2008-09-22T11:40:29+01:00 0:12 11.880u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/colors.xml"
2008-09-22T11:40:29+01:00 0:12 11.880u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "/home/louisd/.magick/colors.xml"
2008-09-22T11:40:29+01:00 0:12 11.890u 6.4.1 Configure convert[4737]: configure.c/unknown/482/Configure
Searching for configure file: "colors.xml"
2008-09-22T11:40:29+01:00 0:12 11.890u 6.4.1 Configure convert[4737]: color.c/unknown/2692/Configure
Loading color map "/tmp/louisd/ifs.7.3.145/installed_libraries/osdir/share/ImageMagick-6.4.1/config/colors.xml" ...
2008-09-22T11:40:30+01:00 0:13 12.100u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Area: 2.34375mb/2.34375mb/4gb
2008-09-22T11:40:30+01:00 0:13 12.100u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Memory: 2.34375mb/4.6875mb/3gb
2008-09-22T11:40:30+01:00 0:13 12.100u 6.4.1 Cache convert[4737]: cache.c/unknown/3525/Cache
open dsc00492.jpg[0] (anonymous memory, 640x480 2.34375mb)
2008-09-22T11:40:30+01:00 0:13 12.100u 6.4.1 Cache convert[4737]: cache.c/unknown/1928/Cache
memory => memory
2008-09-22T11:40:30+01:00 0:13 12.590u 6.4.1 Resource convert[4737]: resource.c/unknown/834/Resource
Memory: 2.34375mb/2.34375mb/3gb
2008-09-22T11:40:30+01:00 0:13 12.590u 6.4.1 Cache convert[4737]: cache.c/unknown/2162/Cache
destroy dsc00492.jpg[0]
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1661/Coder
Image resolution: 72,72
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Resource convert[4737]: resource.c/unknown/219/Resource
Memory: 2.34375mb/4.6875mb/3gb
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Resource convert[4737]: resource.c/unknown/834/Resource
Memory: 2.34375mb/2.34375mb/3gb
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1707/Coder
Interlace: non-progressive
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1722/Coder
Quality: 97
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1762/Coder
Input sampling-factors=2x1,1x1,1x1
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1826/Coder
Storage class: DirectClass
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1828/Coder
Depth: 16
2008-09-22T11:40:30+01:00 0:13 12.610u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1834/Coder
Number of colors: unspecified
2008-09-22T11:40:30+01:00 0:13 12.620u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1836/Coder
JPEG data precision: 8
2008-09-22T11:40:30+01:00 0:13 12.620u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1890/Coder
Image colorspace is RGB
2008-09-22T11:40:30+01:00 0:13 12.620u 6.4.1 Coder convert[4737]: jpeg.c/unknown/1892/Coder
Sampling factors: 2x1,1x1,1x1
2008-09-22T11:40:30+01:00 0:13 12.850u 6.4.1 Resource convert[4737]: resource.c/unknown/834/Resource
Memory: 2.34375mb/0b/3gb
2008-09-22T11:40:30+01:00 0:13 12.850u 6.4.1 Cache convert[4737]: cache.c/unknown/2162/Cache
destroy dsc00492.jpg[0]
Top
Bonzo
Posts: 2971
Joined: 2006-05-20T08:08:19-07:00
Location: Cambridge, England

Re: How to speed up Image Magick on 2MB images (is *very* slow)

Post by Bonzo »

I thought the convert -size 1280x960 was supposed to be the input image size but it should be the thumbnail size. What happens if you change it to convert -size 640x480
Top
louisdunne

Re: How to speed up Image Magick on 2MB images (is *very* slow)

Post by louisdunne »

Bonzo wrote:I thought the convert -size 1280x960 was supposed to be the input image size but it should be the thumbnail size. What happens if you change it to convert -size 640x480
Hi, thanks for replying.

It doesn't seem to make a difference what I use for -size. I've been setting it to twice the size of the thumbnail size as suggested at http://www.imagemagick.org/Usage/thumbnails/ If I remove -size or set it to the same size as the thumbnail size it makes no difference in the time it takes to generate the thumbnail.

Louis
Top
User avatar
magick
Site Admin
Posts: 11064
Joined: 2003-05-31T11:32:55-07:00

Re: How to speed up Image Magick on 2MB images (is *very* slow)

Post by magick »

We're using ImageMagick 6.4.3-7. We tried your command on a 3ghz Linux box and it completed in 0.138 seconds.
Top
louisdunne

Re: How to speed up Image Magick on 2MB images (is *very* slow)

Post by louisdunne »

magick wrote:We're using ImageMagick 6.4.3-7. We tried your command on a 3ghz Linux box and it completed in 0.138 seconds.
Thanks for replying. I'm guessing you must have used a small image. We're using 4GHz Xeon's here and it takes 6 seconds for 2MB images.

You don't mention what size image you used. A typical image I'm using is described by identify as:

dsc00492.jpg JPEG 2848x2136 2848x2136+0+0 DirectClass 8-bit 2.29358mb

I guess I forgot to mention the version number - it's 6.4.1. All of this is using local disks BTW. I get the same performance issues whether I use the prebuild binaries from (sunfreeware.com) or if I build everything from scratch myself with gcc and -O2 (or -O3).

What information can I provide to help in tracking this down?


Louis
Top
User avatar
magick
Site Admin
Posts: 11064
Joined: 2003-05-31T11:32:55-07:00

Re: How to speed up Image Magick on 2MB images (is *very* slow)

Post by magick »

Can you download / install ImageMagick 6.4.3-7? We have a number of performance issues addressed in that release. Otherwise we're clueless why so slow. We tried your command on an image the size you stated on our slow 2.2ghz box with 2GB of memory and it ran in 0.76 seconds.
Top
Bonzo
Posts: 2971
Joined: 2006-05-20T08:08:19-07:00
Location: Cambridge, England

Re: How to speed up Image Magick on 2MB images (is *very* slow)

Post by Bonzo »

Run using php on an 4-5 year old XP computer:

Code: Select all

exec("convert -size 640x480 print2.jpg -auto-orient -thumbnail 640x480 -background transparent -gravity center -extent 640x480 img-640x480.jpg");
// This page was created in 0.734441995621 seconds

exec("convert -size 1280x960 print2.jpg -auto-orient -thumbnail 640x480 -background transparent -gravity center -extent 640x480 img-640x480.jpg");
// This page was created in 1.78649687767 seconds
P.S. Forgot to say IM Version 6.4.0 and the photo was 2.82 MB
Last edited by Bonzo on 2008-09-22T13:12:10-07:00, edited 1 time in total.
Top
louisdunne

Re: How to speed up Image Magick on 2MB images (is *very* slow)

Post by louisdunne »

Thanks for the replies everyone. I'll try 6.4.3-7 and report back tomorrow.

Louis
Top
Post Reply

Return to “Users”