bash-3.2$ /bin/perl -v

This is perl, v5.10.0 built for cygwin-thread-multi-64int
(with 6 registered patches, see perl -V for more detail)

Copyright 1987-2007, Larry Wall

[snip]

bash-3.2$ /bin/perl test.pl
Records: 308273 in 6.719 seconds
Records: 279997 in 5.875 seconds
Records: 308273 in 6.484 seconds
Records: 279997 in 5.906 seconds
Records: 308273 in 6.515 seconds