Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
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Date: Tue, 15 Sep 2015 09:57:18 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: Judy array

On 2015-09-15 05:40, Solar Designer wrote:
> This saves 4 seconds, but only when -mem=999999999 is also used:
>
> -WordlistMemoryMap = Y
> +WordlistMemoryMap = N

FWIW we have -mem=0 as a (somewhat backwards) shortcut for "no limit".

We could probably default to not mmap when that other buffer is used. 
Using mmap doesn't make much sense then anyway (but I never saw any hit 
from it so I opted for simplicity).

> I think there might still be wordlist duplicate suppression going on.
> It would be nice to try disabling it.

It may currently come with that memory buffer. I'll see what I can do.

> The addition of source() method for raw-md5 helps a lot.  Without it,
> and without the copy-on-write avoidance in cracker.c, I couldn't run
> 8 processes on this machine without it getting into swap.  Perhaps we
> should add source() to more formats.

I dropped source() from a few formats when I added reversing steps. I 
think I was confused: You can't have source() with a reduced binary - 
but reversing steps does not mandate a reduced binary.

magnum

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