Author: Frank Phillips
Date: 08:26:20 12/26/02
Go up one level in this thread
On December 26, 2002 at 10:59:34, Robert Hyatt wrote: >On December 26, 2002 at 10:49:52, Frank Phillips wrote: > >>On December 26, 2002 at 09:33:43, Eugene Nalimov wrote: >> >>>From my experience: Intel's compiler shines where application spent majority of >>>its time in several tight loops. When execution time is more-or-less evenly >>>spread across the large application it's more important to get shorter code than >>>to emit locally optimal but longer code. >>> >>>Thanks, >>>Eugene >> >>This seems consistent with an Intel 1.1 MByte executable compared to around 400 >>kBytes for gcc. >> >>Frank > > >It is probably unrelated to that. The size difference is most likely a >library issue. IE my intel executables on linux are in the same size range >is the executables for gcc 3.x. But both use ld.so-type shared libraries that >are _not_ a part of the executable file while it sits on disk. The executables are for Linux. Linked with a standard install of the Intel compiler; and not statically linked. Are you linking with another library? Frank > >> >>> >>>On December 25, 2002 at 22:34:41, Robert Hyatt wrote: >>> >>>>On December 24, 2002 at 10:55:17, Vincent Diepeveen wrote: >>>> >>>>>On December 24, 2002 at 04:47:21, Frank Phillips wrote: >>>>> >>>>>>On December 23, 2002 at 12:12:29, Vincent Diepeveen wrote: >>>>>> >>>>>>>On December 23, 2002 at 12:01:10, Robert Hyatt wrote: >>>>>>> >>>>>>>You forget the crucial data point and that's that you have >>>>>>>no AMD K7s out there. >>>>>> >>>>>>Intel is about 30% faster than gcc3.2 (and gcc2.95 and gcc 2.96) with profile >>>>>>guided optimisation for me on my AMD Athlons (Palomino and Thoroughbred). Not >>>>>>all of this can be due to incompetence, I suggest. >>>>>> >>>>>>Frank >>>>> >>>>>you must be using bitboards then. No other option possible. >>>>>profile guided optimization speeds me up 20% at k7 with gcc 3.x >>>>> >>>> >>>> >>>>How can you possibly say "no other option possible"??? >>>> >>>>Intel _also_ does profile-guided optimizations. But I can think of _lots_ >>>>of reasons why he might get better results than you get. Starting with his >>>>programming style which might be _better_...
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