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Date: Sat, 23 Jul 2011 23:12:05 +0400
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: 1.7.8 to jumbo2 speed regression for FreeBSD md5

James,

On Sat, Jul 23, 2011 at 02:04:39PM -0500, James Nobis wrote:
> On my Phenom II X6 1090T @ 3.2Ghz (Black edition) with all the auto OC
> boost disabled I ran run/john -test against a build with make
> linux-x86-64 on each.
> 
> john-1.7.8
> Benchmarking: FreeBSD MD5 [32/64 X2]... DONE
> Raw:	14537 c/s real, 14566 c/s virtual
> 
> john-1.7.8-jumbo2
> Benchmarking: FreeBSD MD5 [8x]... DONE
> Raw:	6656 c/s real, 6656 c/s virtual

Thank you for reporting this!

What gcc version are you using?  There's a check that disables the new
intrinsics-based code for gcc below 4.0, but perhaps we should be
disabling it for some 4.x versions as well...  Maybe below 4.2 or
something like that.  Someone should test more of these to determine the
exact version starting with which the new code is beneficial.

Alexander

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