Before:
$ /usr/bin/time ./ssimulacra ClassA_8bit_p06.ppm.png ClassA_8bit_p06.ppm.png.jpg
0.01572459
3.63user 2.38system 0:05.83elapsed 103%CPU (0avgtext+0avgdata 2689836maxresident)k

After:
$ /usr/bin/time ./ssimulacra ClassA_8bit_p06.ppm.png ClassA_8bit_p06.ppm.png.jpg
0.01572470
3.26user 0.51system 0:03.62elapsed 104%CPU (0avgtext+0avgdata 1208516maxresident)k