From: Ilmari Heikkinen <ilmari.heikkinen@...>
Date: 2007-09-25T03:32:39+09:00
Subject: Re: I am new to Ruby and I could use some expert advice as to how I can make this code run faster.

On 9/24/07, Joel VanderWerf <vjoel@path.berkeley.edu> wrote:
> On 9/24/07, Ilmari Heikkinen <ilmari.heikkinen@gmail.com> wrote:
> ...
>  > And here's a C version:
>
> To give C its fair due, you might try with
>
>     unsigned long *buf;
>
> and
>
>         buf[i] |= 0x80808080;
>
> (and the other necessary changes, of course).
>
> --
>         vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407

I tried that a while ago, it was roughly twice as fast as the per-byte version.
But it had a bug with the last % 4 bytes and I wasn't hardcore enough to
bother fixing it.

And a version with 64-bit ints was even faster. But it had a bug too.

Anyone wish to contribute working versions :)?