md5 benchmark

gistfile1.txt

 $ rex bench
[2015-06-13 15:27:07] <local> INFO - Running task bench on <local>
Benchmark: timing 100 iterations of new_large, new_small, old_large, old_small...
 new_large: 2 0.11 0.11 0.62 0.03 100 None @ 114.94/s (n=100)
 new_small: 2 0.06 0.16 0.52 0.06 100 None @ 125.00/s (n=100)
 old_large: 108 0.17 0.21 101.85 5.35 100 None @  0.93/s (n=100)
 old_small: 2 0.11 0.28 0 0 100 None @ 256.41/s (n=100)
            (warning: too few iterations for a reliable count)
             Rate old_large new_large new_small old_small
old_large 0.930/s        --      -99%      -99%     -100%
new_large   115/s    12266%        --       -8%      -55%
new_small   125/s    13347%        9%        --      -51%
old_small   256/s    27485%      123%      105%        --