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Mail Archives: djgpp/2008/06/16/22:01:16

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From: Rugxulo <rugxulo AT gmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: "-mtune=pentium" still default??
Date: Mon, 16 Jun 2008 18:56:25 -0700 (PDT)
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Okay, first of all, I still have a Pentium I (166 Mhz, no MMX) that I
run stuff on occasionally, but I have to admit that such isn't as
common as it used to be. By now, most people have other, newer
computers (even me). But even DJGPP's latest version of GCC (4.2.3)
still uses "-mtune=pentium" by default. I think this is slightly less
wise than it would be if more people used such machines. Anyways, not
a big deal. BUT, then it seems that *compiling* with "-mtune=i686" is
actually faster (!) than with i586, i486, or i386. Granted, I didn't
test on too many files, and it may be cpu dependent (although I did
test on a few different machines), but it *seemed* to be the case
(independent benchmarks welcome). So, that's my take, and those are
two reasons why I think DJGPP should use "-mtune=i686" by default in
later versions.

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