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Subject: gcc versus intel c

Author: Sean Mintz

Date: 17:43:13 02/18/03


Using the latest MingW32 available (gcc 3.2, for windows) I compiled tscp 1.73.
A long time ago I had compiled 1.73 using intel c 5 with all optimizations and
profiling and made the fastest executable for amd processors there was (you can
even check the tscp benchmark site
http://home.attbi.com/~tckerrigan/bench.html).

Here's the results:

Compiler   MIPS
Intel C[1] 1452.4
GCC[2]     1598.1

1 - (Profile directed) icl *.c -O2 -Qipo -QxiM -G6 -Qunroll -Qprof_use
-Qprof_dir c:\profiles

2 - -O3 -march=athlon-mp -mcpu=athlon-mp -mfpmath=sse -mmmx -fomit-frame-pointer
-funroll-loops -finline-functions -fprefetch-loop-arrays

Those same options get 215knps with tscp 1.8. Intel gets 193knps...

I'm on a dual athlon mp 1.2 ghz on a tyan tiger s2460 with 512 mb memory.



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