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Date: Tue, 7 May 2013 08:29:48 -0700
From: Tavis Ormandy <>
Subject: Re: --fork

Solar Designer <> wrote:

> magnum, all -
> I've just pushed my --fork implementation to the public CVS repository.
> Please help test it, and merge it into bleeding.
> Thanks,
> Alexander

Hey Solar, if I understand correctly this skips the inc_key_loop step on
alternate nodes during do_inc_crack to distribute the work (similar in
concept, but less overhead than the parallel external mode).


for (i = 0; i < n; i++) {
 if (this_node % i == 0)

I have an algorithm to skip to an arbitrary state in constant time without
having to increment it, would you be interested in a patch against core? I
guess it would be more invasive, but would save a lot of cycles (especially
on a large number of nodes).

I wrote about it here:


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