[fpc-pascal] Speed difference between intel/ppc on intel Mac

Jonas Maebe jonas.maebe at elis.ugent.be
Sun Sep 7 23:17:49 CEST 2008

On 07 Sep 2008, at 21:38, Micha Nelissen wrote:

> Jonas Maebe wrote:
>> You can use -vd to have the compiler print out all compiler options  
>> it interprets (both from configuration files and from the command  
>> line). In general, to get the best code for an Intel Core family  
>> processor, use something like
>> -O3ppentium4 -Cppentium4 -Cfsse2
>> i doubt it'll speed up your program by a factor of 2 in any case  
>> though.
> Hmm there are weak spots in FPC. E.g. fannkuch in the shootout:
> http://shootout.alioth.debian.org/u32/benchmark.php?test=fannkuch&lang=fpascal&id=5
> FPC is 2.1 times slower than gcc here. Maybe this program is like it?

The program of Tom is compiled by FCP/PPC and emulated on an Intel  
machine vs compiled by FPC/Intel and run natively on the same Intel  
machine, with the former being 2 times faster than the latter.  
Programs written for advocacy purposes by different people in  
different languages and compiled by completely different compilers but  
for the same target architecture don't really seem to be very relevant  
to me in this case.


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