Date: Wed, 20 Jun 2007 12:09:16 -0400 From: Kris Kennaway <kris@obsecurity.org> To: David Cross <dcross@okcupid.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Very slow sed... Message-ID: <20070620160916.GA26574@rot26.obsecurity.org> In-Reply-To: <20070620100737.S56928@max.okcupid.com> References: <20070620100737.S56928@max.okcupid.com>
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[-- Attachment #1 --] On Wed, Jun 20, 2007 at 10:24:01AM -0400, David Cross wrote: > Machine 2: > time sed -f > /usr/src/gnu/usr.bin/groff/tmac/../../../../contrib/groff/tmac/strip.sed > /usr/src/gnu/usr.bin/groff/tmac/../../../../contrib/groff/tmac/doc-common > >/dev/null > > real 0m4.506s > user 0m4.167s > sys 0m0.000s > > Yes... you read that right... almost 400 _TIMES_ slower. WTF.. > > Where should I be looking? Try ktracing to see what it is doing (although sys time = 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 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.3 (FreeBSD) iD8DBQFGeVEsWry0BWjoQKURAm/OAJ9vKSiovbuut+3iEWttz7maJSSAlQCg9kv2 a+/nvwgDUN61CQtZ9MPu9Sk= =miy5 -----END PGP SIGNATURE-----
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