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Date: Thu, 30 Aug 2012 02:32:52 +0400
From: Alexander Cherepanov <>
Subject: Re: JtR vs. hashcat on /r/crypto

On 2012-08-28 23:21, jfoug wrote:
>> 2. It turns out (was news to me) that hashcat added SunMD5 support
>> recently (on CPU).  According to atom, it does not use SIMD, yet is
>> faster than ours with SIMD (JimF's unreleased code in magnum-jumbo).
>> I've asked atom for specific speed numbers, but we might want to do our
>> own benchmarks as well (Jim?), if we don't mind running the closed-
>> source hashcat for that. ;-)
> I have a strong belief the coin flip logic we have (the original sun logic),
> is where the speedup can be found. Yes, we did remove a %5 in one of the
> loops.  But there still has to be a LOT of optimization left. There is a lot
> of temp memory usage, and memory movement.  

Indeed all those crazy arrays can easily be ditched. Patched is posted
to john-dev.

Alexander Cherepanov

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