ImageMagick vs GraphicsMagick, no strings attached.

[emmanuel@going_merry ~/Desktop/test]
$ gm -version
GraphicsMagick 1.3.5 2009-01-26 Q8 http://www.GraphicsMagick.org/
Copyright (C) 2002-2009 GraphicsMagick Group.
Additional copyrights and licenses apply to this software.
See http://www.GraphicsMagick.org/www/Copyright.html for details.

[emmanuel@going_merry ~/Desktop/test]
$ convert –version
Version: ImageMagick 6.4.9-2 2009-02-08 Q16 OpenMP http://www.imagemagick.org
Copyright: Copyright (C) 1999-2009 ImageMagick Studio LLC

[emmanuel@going_merry ~/Desktop/test]
$ du src -h
62M src

[emmanuel@going_merry ~/Desktop/test]
$ time find src -type f | xargs -I {} gm convert -sample 25%x25% {} ./dst/{}

real 0m24.593s
user 0m22.172s
sys 0m1.383s

[emmanuel@going_merry ~/Desktop/test]
$ time find src -type f | xargs -I {} convert -sample 25%x25% {} ./dst/{}

real 0m29.137s
user 0m24.888s
sys 0m2.953s

Conclusion: GraphicsMagick 1.2X faster than ImageMagick

EOF