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Message-ID: <20080719193750.GA6479@openwall.com>
Date: Sat, 19 Jul 2008 23:37:50 +0400
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: JtR 1.7.3.1
On Sat, Jul 19, 2008 at 05:47:20PM +0300, Henri Salo wrote:
> I noticed a big improvement on FreeBSD MD5 [32/64 X2].
If you were using the same make target before, then there should be no
improvement for this hash type between 1.7.2 and 1.7.3.1. However, if
you were using a "plain x86" make target, then going for a -x86-64 one
should improve performance at this hash type greatly (maybe by 50%,
although this differs across CPUs). -x86-64 targets were not previously
available for Mac OS X and Solaris, so if you're using one of those
systems then this can be regarded as a speedup with the new version.
> I have no idea
> why it takes less memory, but it used to take aroun 20M per proccess
> and now it is like 6M. I'm using ps -eorss,cmd
That's weird. It should not have been taking 20 MB before, unless you
were loading a lot of hashes (tens of thousands), but you're not now.
You never mentioned what OS/version/hardware this applies to. Your mail
headers and "ps" command options suggest Linux, but like I mentioned
x86-64 was fully supported under Linux before. And it's a bit tricky to
build a "plain x86" binary under typical Linux distributions for x86-64
(there exist undocumented/unlisted make targets for that; I doubt that
you've been using one of those).
So while I am happy that you like the new version, I am really puzzled
by your comments. Something must have gone wrong on your end when you
were trying the previous version out.
Thanks,
Alexander
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