$ time wc -l lesms10_big.txt
 14152200 lesms10_big.txt

real 0m0.351s
user 0m0.296s
sys  0m0.055s

$ time ./wc.pl -l lesms10_big.txt
 14152200 lesms10_big.txt

real 0m0.208s
user 0m0.678s
sys  0m0.835s