use strict;
use warnings;

use Time::HiRes 'time';

my $start = time;
my @ten = ( 0 .. 9 );
my %count;

$count{ $ten[ rand @ten ] }++ for 1..10_000_000;

print "$_ -> $count{$_}\n" for @ten;
printf "duration: %0.3f seconds\n", time - $start;