$ time ./original.pl
real    1m50.885s
user    1m39.513s
sys     0m0.380s

$ time ./inline_c.pl
real    0m35.999s
user    0m31.254s
sys     0m0.590s

$ time ./ver_2.pl
real    1m51.122s
user    1m49.407s
sys     0m0.440s

$ time ./ver_3.pl
real    1m18.209s
user    1m16.810s
sys     0m0.330s

$ time ./tall_man.pl
real    1m23.238s
user    1m15.989s
sys     0m0.500s