gistfile1.txt

use strict;
use warnings;
use Benchmark qw/cmpthese/;
use Math::Random::MT;

cmpthese(
    10000000,
    {
        mt => sub {
            Math::Random::MT::rand(1);
        },
        rand => sub {
            rand(1);
        },
    }
);

---

            (warning: too few iterations for a reliable count)
           Rate    mt  rand
mt    1014199/s    --  -96%
rand 25641026/s 2428%    --