Old version (total time for 10 iterations):

real    0m1.532s
user    0m1.533s
sys     0m0.000s

New version (total time for 10 iterations):

real    6m48.716s
user    6m49.163s
sys     0m0.000s

Optimized new version (total time for 10 iterations):

real	5m20.007s
user	5m20.357s
sys	0m0.000s