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Date: Wed, 07 Jan 2009 10:33:09 -0800
From: Tim Kientzle <kientzle@freebsd.org>
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To: Kris Kennaway <kris@freebsd.org>
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Cc: freebsd-hackers@freebsd.org, Christian Weisgerber <naddy@mips.inka.de>
Subject: Re: lzo2 shows insane speed gap
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Kris Kennaway wrote:
> Christian Weisgerber wrote:
>> Bruce Cran <bruce@cran.org.uk> wrote:
>>
>>> 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.
>> ...
>>
>> But still.  Two orders of magnitude?  That is a pathological case.
> 
> Probably it means that lzo2 is doing pathological numbers of mallocs.

Rather, the lzo2 test suite.  Test suites do tend
to hammer malloc() pretty hard.  I see similar variations
for the libarchive test suite with malloc debugging.

Tim