From: zinc <zinc@zifi.genetics.utah.edu>
Date: Thu, 24 Aug 95 01:13:09 PDT
To: Piete Brooks <Piete.Brooks@cl.cam.ac.uk>
Subject: Re: Brute SSL Challenge
In-Reply-To: <"swan.cl.cam.:169220:950824070545"@cl.cam.ac.uk>
Message-ID: <Pine.LNX.3.91.950824020947.452B-100000@zifi.genetics.utah.edu>
MIME-Version: 1.0
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On Thu, 24 Aug 1995, Piete Brooks wrote:

> Date: Thu, 24 Aug 1995 08:05:33 +0100
> From: Piete Brooks <Piete.Brooks@cl.cam.ac.uk>
> To: David Neal <dneal@usis.com>
> Cc: cypherpunks@toad.com
> Subject: Re: Brute SSL Challenge
> 
> > Hopefully everyone on here is accomplished enough to know
> > optimizing the brutessl code helps immensely.  If not, well I used
> > 
> > gcc -O6 -funroll-loops -fomit-frame-pointer -finline-functions -c search.c
> > gcc -O6 -funroll-loops -fomit-frame-pointer -finline-functions -o brutessl \
> >                      brutessl.c search.o
> > 
> > To go from 5,000 keys per second to 10,100 keys per second.
> 
> If people could send me timings for various compilers / flags I'll collate a
> table of speeds [see brutessl.h 1.02 for an example -- I tried using different
> sizes for the RC4 info and it appears that only ALPHAs really gain by using int]
> 
> I recommend that you do not blindly use the above flags -- I just tried it on
> our fastest machines (SGIs) and it *REDUCED* the speed from 35200 to 28400.

this resulted in a fairly significant increase on my machine (486
DX4-100 running Linux 1.2.11)

stats:

w/o optimizations: 
17 minutes and 45 seconds per segment, 15800 keys per second .

w/ opts:
16 minutes and 56 seconds per segment, 16500 keys per second.

- -pjf

patrick finerty = zinc@zifi.genetics.utah.edu = pfinerty@nyx.cs.du.edu
U of Utah biochem grad student in the Bass lab - zinc fingers + dsRNA!
** FINGER zinc-pgp@zifi.genetics.utah.edu for pgp public key - CRYPTO!
zifi runs LINUX 1.2.11 -=-=-=WEB=-=-=->  http://zifi.genetics.utah.edu 


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