Date: Thu, 13 Feb 1997 14:15:17 -0800 (PST) From: "Jonathan M. Bresler" <jmb> To: asami@vader.cs.berkeley.edu (Satoshi Asami) Cc: hamby@aris.jpl.nasa.gov, hackers@freebsd.org Subject: Re: Sun Workshop compiler vs. GCC? Message-ID: <199702132215.OAA12899@freefall.freebsd.org> In-Reply-To: <199702132125.NAA18583@vader.cs.berkeley.edu> from "Satoshi Asami" at Feb 13, 97 01:25:59 pm
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Satoshi Asami wrote: > > * optimization than previous versions. With the -fast option (which turns > * on full optimization, plus 486, Pentium, or PPro optimization as > * appropriate), it does seem to take about 3 times as long to compile > * anything as GCC (on my 486DX4/100), and so I would hope that the generated > * code is much better. > > Well, I don't think so. Compiler optimizations are generally the best > examples of "law of dimishing returns". ;) well, options make a huge difference on sun's compiler (SC4.0 18 Oct 1995 C 4.0) compare the numbers vs the options listed below 6009606.087651: -O5 -dalign -native -xautopar <== strange 6051658.950850: -xO5 -dalign -native 3290361.568528: -xO5 -dalign 3274313.272930: -xO5 jmb
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