Date: Tue, 06 Aug 2002 14:55:49 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Dan Nelson <dnelson@allantgroup.com> Cc: Darren Pilgrim <dmp@pantherdragon.org>, Jason Andresen <jandrese@mitre.org>, Dmitry Morozovsky <marck@rinet.ru>, hackers@FreeBSD.ORG Subject: Re: -fomit-frame-pointer for the world build Message-ID: <3D5045E5.A0EB74F2@mindspring.com> References: <20020802212841.R58905-100000@woozle.rinet.ru> <3D4AC526.4CD399B3@mindspring.com> <3D4C8464.A2F4775A@pantherdragon.org> <3D4CC81F.94526C8A@mindspring.com> <3D4EA466.C1289F0F@mitre.org> <3D4EF091.EA1C91D3@pantherdragon.org> <3D4F0A5F.9B76573F@mindspring.com> <3D4F58B2.E58C2865@pantherdragon.org> <3D4F751E.1A5C1327@mindspring.com> <20020806141548.GB78723@dan.emsphone.com>
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Dan Nelson wrote: > > I don't know. I don't think anyone has spent the effort on an audit, > > just so they could turn on an optimization that is only going to > > impact function call overhead, mostly in poorly written programs that > > have a high "calling functions vs. doing real work" ratio. 8-). > > I thought the main thing you got out of -fomit-frame-pointer was a free > register, which is a scarce commodity on x86. Most people don't use huge numbers of variables in their fnctions when writing kernel code, since there's only ~5K of stack. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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