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Date: Wed, 01 Apr 2015 02:10:27 +0200
From: magnum <>
Subject: Re: Advice on proposal: John the Ripper jumbo robustness

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?


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