tokuhirom's Blog

Math::Random::MT versus embedded function rand()

5.010001
Math::Random::MT: 1.10
             Rate     mt rand()
mt       714566/s     --   -96%
rand() 19268703/s  2597%     --

use strict;
use warnings;
use Benchmark ':all';
use Math::Random::MT;

my $mt = Math::Random::MT->new(time);
srand(time);

print "$]\n";
print "Math::Random::MT: $Math::Random::MT::VERSION\n";

cmpthese(
    -1 => {
        'rand()' => sub { rand() },
        'mt' => sub { $mt->rand() },
    }
);

まあ妥当かな、という印象。

なお、このベンチは本当です。