Date: Fri, 18 May 2012 21:19:17 +0200 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: Performance Considerations of stdin On 05/18/2012 08:31 PM, jfoug wrote: >> From: Brad Tilley [mailto:brad@...ystems.com] >> Basically, I'm wondering if a word generation program that passed words >> into JTR via stdin would perform better than when JTR is doing both word >> mangling and hash generation, hash testing, etc all by itself. >> >> ehco -n word | john --sdtin >> >> Has anyone had experience performance testing something such as this? > > Depends upon the OS. If it is winblows, then the performance is horrible. > I get about 30% or so performance for fast hashes, vs a dictionary read into > memory, with rules run on the dictionary. Windows has a TINY pipe_buffer. > I have found no way to speed this up (and I have tried). Isn't this Windows problem mitigated a little (or a lot) if using --pipe instead of --stdin? If not, I suppose we could make it to. magnum
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