Date: Wed, 3 Jun 1998 23:47:49 -0500 (EST) From: "John S. Dyson" <dyson@FreeBSD.ORG> To: mike@smith.net.au (Mike Smith) Cc: dmm125@bellatlantic.net, james@jraynard.demon.co.uk, hackers@FreeBSD.ORG Subject: Re: Recompiling sources with "-O2 -m486 -pipe" Message-ID: <199806040447.XAA00815@dyson.iquest.net> In-Reply-To: <199806032301.QAA01867@dingo.cdrom.com> from Mike Smith at "Jun 3, 98 04:01:10 pm"
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Mike Smith said: > > > > About the -m486 option -- I use -m486 -O3 -pipe all the time; does it slow > > down the execution somewhat? I noticed the Mozilla sources defined > > -mno-486. Do you know if compiling with -mno-486 gives better results > > than -m486 as far as speed, etc.? I figured that -m486 generated 486 > > instructions, which would make a pentium run faster. > > There are no 486 instructions to generate, and anything over -O runs > the risk of exposing bugs in the gcc optimiser it seems. > -m486 expands the code somewhat, with larger alignment boundaries. Netscape is already very big :-). -- John | Never try to teach a pig to sing, dyson@freebsd.org | it just makes you look stupid, jdyson@nc.com | and it irritates the pig. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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