#!/usr/bin/perl -w my $cnt = shift || 1000; my $collision = 0; for (1..$cnt) { my $foo = `$^X -l -Mblib smp-test/uuid-fork.pl`; my @ret = ($foo =~ m/^(.*)$/mg); ++$collision#, print "==> collision ($foo)\n" if $ret[0] eq $ret[1]; } print sprintf("%5.3f %% collision\n", $collision*100/$cnt);