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Date: Tue, 30 Dec 2008 02:05:24 +0000
From: Bruce Cran <bruce@cran.org.uk>
To: Christian Weisgerber <naddy@mips.inka.de>
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Cc: Nate Eldredge <neldredge@math.ucsd.edu>, freebsd-hackers@freebsd.org
Subject: Re: lzo2 shows insane speed gap
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On Tue, 30 Dec 2008 01:47:47 +0100
Christian Weisgerber <naddy@mips.inka.de> wrote:

> Nate Eldredge:
> 
> > It might be good first to rule out compiler / library differences.
> 
> Sure.  Let's cut this short:
> 
> "Slow"
> Athlon 64 X2 5200+ 2.6 GHz,          FreeBSD 8.0-CURRENT amd64   ~60
> min Phenom 9350e 2.0 GHz,                OpenBSD 4.4-CURRENT amd64
> ~80 min UltraSPARC-IIe 500 MHz (Blade 100),  OpenBSD 4.4-CURRENT
> sparc64  10 h++
> 
> "Fast"
> Pentium 4 3.0 GHz,                   FreeBSD 6.4-RELEASE i386     36 s
> Xeon E5405 2.0 GHz (PowerEdge 1950), OpenBSD 4.4-CURRENT amd64    47 s
> Alpha 21164A 500 MHz (AlphaPC164),   OpenBSD 4.4-CURRENT alpha     9
> min
> 
> Let me draw your attention to the fact that the two amd64 systems
> that run different operating systems are both slow, whereas the two
> amd64 systems that run the same operating system (compiler, libraries)
> diverge in speed.
> 
> 
> Oh, and everybody is invited to run
> 
> $ cd /usr/ports/archivers/lzo2 && make

I'm running 8.0-CURRENT amd64 here on a Turion64 X2 machine. Without
malloc debugging (malloc.conf -> aj) 'make test' takes 25s; after
removing malloc.conf thus turning on debugging, it takes over 10
minutes.

-- 
Bruce Cran