2 - immediate display of next image (preloading of next images)
3 - keep position in browser (no page load between images)
4 - multiproc support (parallelize image creations)
9 P4 HT 2.8 GHz, Linux 2.6.6 SMP 4G
12 125.61user 5.17system 2:10.81elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
15 234.92user 6.77system 2:01.44elapsed 199%CPU (0avgtext+0avgdata 0maxresident)k
18 233.35user 6.57system 2:02.03elapsed 196%CPU (0avgtext+0avgdata 0maxresident)k