sgkirkup@72sp691lin:~$ ./performance-test.pl 
Section A took 0.8600 CPU seconds
Section B took 2.1800 CPU seconds
Section A took 0.8800 CPU seconds
Section B took 2.2200 CPU seconds
sgkirkup@72sp691lin:~$ ./performance-test.pl 
Section A took 0.8200 CPU seconds
Section B took 2.1300 CPU seconds
Section A took 0.8500 CPU seconds
Section B took 2.1800 CPU seconds
sgkirkup@72sp691lin:~$ ./performance-test.pl 
Section A took 0.8300 CPU seconds
Section B took 2.2100 CPU seconds
Section A took 0.8600 CPU seconds
Section B took 2.1900 CPU seconds
sgkirkup@72sp691lin:~$ perl -v

This is perl, v5.8.8 built for i486-linux-gnu-thread-multi

Copyright 1987-2006, Larry Wall

Perl may be copied only under the terms of either the Artistic License or the
GNU General Public License, which may be found in the Perl 5 source kit.

Complete documentation for Perl, including FAQ lists, should be found on
this system using "man perl" or "perldoc perl".  If you have access to the
Internet, point your browser at http://www.perl.org/, the Perl Home Page.