[sam@localhost xml_test]$ time ./parser.pl > parser.out
 
real    0m1.827s
user    0m1.730s
sys     0m0.040s

[sam@localhost xml_test]$ time ./regex.pl > regex.out
 
real    0m0.200s
user    0m0.160s
sys     0m0.040s

[sam@localhost xml_test]$ diff parser.out regex.out