Rate return no ret
return 4682554/s     --   -30%
no ret 6642457/s    42%     --

##</code><code>##

use Benchmark qw( cmpthese );

my %hash = (1, 2, 4, 6, 43, 32, 5, 6, 6, 43, 3, 54, 5, 1);

cmpthese(0, {
    'return' => sub { return \%hash },
    'no ret' => sub { \%hash },
});