resize (800x800)

Generating resize of size 800x800 with these commands:

netpbm 10.20 jpegtopnm -quiet ${SOURCE} | pnmscale -xysize 800 800 | pnmtojpeg --quality=75 > ${DEST}
ImageMagick 4.2.9 convert -size 800x800 -geometry 800x800 -quality 75 ${SOURCE} ${DEST}
ImageMagick 5.4.2 convert -size 800x800 -geometry 800x800 -quality 75 ${SOURCE} ${DEST}
ImageMagick 6.0.7 convert -size 800x800 -geometry 800x800 -quality 75 ${SOURCE} ${DEST}
GraphicsMagick 1.0.5 gm convert -size 800x800 -geometry 800x800 -quality 75 ${SOURCE} ${DEST}
gd 2.0.28 createFromJpeg(${SOURCE}); copyResampled($im, 0, 0, 0, 0, ${SIZE_X}, ${SIZE_Y}, ${ORIG_SIZE_X}, ${ORIG_SIZE_Y}); jpeg(${DEST}, 75)

Source: amsterdam.jpg (2272x1704) 839946 bytes
Generated image Tested toolkit Elapsed time Generated filesize
netpbm 10.20 9.28s 103950 bytes
ImageMagick 4.2.9 3.10s 104185 bytes
ImageMagick 5.4.2 3.62s 118263 bytes
(with profile)
ImageMagick 6.0.7 4.17s 125401 bytes
(with profile)
GraphicsMagick 1.0.5 3.95s 103855 bytes
gd 2.0.28 10.98s 104029 bytes
 
Source: hochzeit.jpg (1600x1200) 867962 bytes
Generated image Tested toolkit Elapsed time Generated filesize
netpbm 10.20 5.29s 91829 bytes
ImageMagick 4.2.9 0.76s 90717 bytes
ImageMagick 5.4.2 5.06s 97989 bytes
(with profile)
ImageMagick 6.0.7 5.50s 105474 bytes
(with profile)
GraphicsMagick 1.0.5 5.56s 92398 bytes
gd 2.0.28 4.17s 91904 bytes