oh i know this, i just think this is an interesting concept. I should have clarified; This would be fast if this is how the processor implemented it. I doubt perl would implement this algorithm so cleanly. Also, i originally wrote something like this up in C.
I guess the whole point is, i know $a * $b is faster than multiply($a, $b);, but who knows, if i have a subroutine: 

sub mult2 {
        my($a, $b)  = @_;
        my $product = 0;

        $product += $a while ($b--);

        return $product;
}

[download]

mine would be faster for larger numbers.. i think. i could always be wrong, its happened before :) I'll have to use Benchmark; to test it ;)

In reply to Re: Re (tilly) 1: Fast Multiplication by zencrypt
in thread Fast Multiplication by zencrypt

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