From: "Gary Smith" <gary DOT smith3 AT virgin DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: Speed problems with AMD K6
Date: Fri, 16 Jan 1998 19:31:17 -0000
Organization: Virgin Net Usenet Service	
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Message-ID: <69ocb5$4dt$1@nclient5-gui.server.virgin.net>
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To: djgpp AT delorie DOT com
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Help..

I have just changed my CPU from a Cyrix 6x86 P166+ to an AMD K6 166MHz, and
have noticed a drop in performance with programmes written using using DJGPP
and Allegro.  The drop in performance is in the region of 20%.

I have benchmarked the AMD and the Cyrix using Wintune 97, and in all the
tests the AMD is faster than the Cyrix. eg:

Floating Point Performance (MFLOPS)
-------------------------------------------------------
AMD K6 P166               98
Cyrix 6x86 P166+          52

Integer Performance  (MIPS)
-----------------------------------------
AMD K6 P166               320
Cyrix 6x86 P166+          250

Does anyone have any ideas as to the cause of the performance drop with the
AMD CPU ?