Date: Wed, 9 Nov 2016 22:12:49 +0100 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: alter default rules or filter, best way to focus on proper candidates? On Wed, Nov 09, 2016 at 02:50:33PM +0100, p+password@...atpro.net wrote: > If I understand correctly, "./john --wordlist=spanish.dic --rules=jumbo" will not create candidates as fast as it could consume them against Raw-SHA1. It might or it might not, but your tests don't show either way because they may very well be bottlenecked by "--stdout", even when you're directing output to /dev/null. You should test performance with an instance of your target hash type, not with "--stdout". Computing a raw SHA-1 hash is possibly quicker (on average, amortized with SIMD) than outputting a candidate password to a pipe. > So I probably should not bother filtering or limit length, even if I know that without any filter 4 candidates out of 5 are a waste of CPU cycles. With fast hashes like this, yes, filtering is usually not worthwhile. Alexander
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