./fisher_yates.pl : after 5000 trials shuffling arrays of size 1000:
BUK : 1696 successes, mean:0.0104235933728858, stdev:0.00897497055761236
List::Util::shuffle : 1690 successes, mean:0.0106133000677379, stdev:0.00908235156157047
tybalt89 : 1614 successes, mean:0.0100835174626996, stdev:0.00897955319759652