From owner-freebsd-hackers@FreeBSD.ORG  Wed Jun 20 16:09:17 2007
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Date: Wed, 20 Jun 2007 12:09:16 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: David Cross <dcross@okcupid.com>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Very slow sed...
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On Wed, Jun 20, 2007 at 10:24:01AM -0400, David Cross wrote:

> Machine 2:
> time sed -f=20
> /usr/src/gnu/usr.bin/groff/tmac/../../../../contrib/groff/tmac/strip.sed=
=20
> /usr/src/gnu/usr.bin/groff/tmac/../../../../contrib/groff/tmac/doc-common=
=20
> >/dev/null
>=20
> real    0m4.506s
> user    0m4.167s
> sys     0m0.000s
>=20
> Yes... you read that right... almost 400 _TIMES_ slower.  WTF..
>=20
> Where should I be looking?

Try ktracing to see what it is doing (although sys time =3D 0 says it's
all in userland).  So maybe gprof or pmc.  Also double check the
kernel configs are identical and malloc debugging is disabled.

Kris

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