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Date: Thu, 02 Apr 2015 02:37:37 +0300
From: Alexander Cherepanov <>
Subject: Re: Advice on proposal: John the Ripper jumbo robustness

On 2015-04-01 03:10, magnum wrote:
> On 2015-04-01 01:51, Alexander Cherepanov wrote:
>> On 2015-03-29 14:08, Kai Zhao wrote:
>>>> it might be more of a distraction from focusing the actual fuzzing jobs.
>>> Yes, I agree with you. It would be better to focus the actual fuzzing
>>> job.
>> The first thing to do with fuzzing john is making john start fast.
>> I've taken a look at it. There are two easy things here: instrumenting
>> only a fuzzed format and john.c make john ~5x faster, removing most
>> content from john.conf makes john ~7x faster. That's 35x boost.
>> Solar, magnum, any other easy ways to make john start faster?
> Registering the dynamic formats usually end up near top in (too) short
> profiling runs, even when not using dynamic. Did you trim the
> dynamic*conf files too?

I think so. They are .include'd into john.conf so emptying it bypasses 
all dynamic*conf.

Alexander Cherepanov

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