bench on tilaa vps

(uname -a && perl -v && time perl ./test.pl) |& tee test.log
Linux tilaa 2.6.32-5-686 #1 SMP Mon Jun 13 04:13:06 UTC 2011 i686 GNU/Linux

This is perl, v5.10.1 (*) built for i486-linux-gnu-thread-multi
(with 53 registered patches, see perl -V for more detail)

Copyright 1987-2009, 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.

custom implementation
                0.302520990371704
List::MoreUtils::part
                0.139189004898071

real    0m6.366s
user    0m6.232s
sys     0m0.112s