Date: Thu, 24 May 2012 22:09:01 +0200 From: Frank Dittrich <frank_dittrich@...mail.com> To: john-dev@...ts.openwall.com Subject: Re: memory usage within JtR and possible ways to significantly reduce it. On 05/24/2012 09:33 PM, jfoug wrote: > The hot/cold does makes a lot of sense. Very good way to try to keep the > locality. For a 10 million candidate search, you still have 40mb of hot > memory and 120mb of 'cold' memory, vs 160mb of arbitrary accessed memory. I > am not sure that reducing from 160mb to 40mb will have that 'huge' of a > help, but it might. I think this is more aimed at a smaller number of hashes. If only about 25% of the memory is hot, then you have about 4 times the number of hashes which can be cracked faster because all hot memory fits into some cache. Frank
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