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Subject: Re: C optimization: int vs char

Author: Dave Gomboc

Date: 16:09:16 10/13/01

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On October 11, 2001 at 13:24:17, Frank Phillips wrote:

>On October 10, 2001 at 17:05:32, Dann Corbit wrote:
>
>>On October 10, 2001 at 16:41:15, Frank Phillips wrote:
>>
>>>On October 10, 2001 at 15:53:36, Gian-Carlo Pascutto wrote:
>>>
>>>>On October 10, 2001 at 14:18:34, Frank Phillips wrote:
>>>>
>>>>>When I find out how to access the gcc3.0.1 documentation I installed I may try
>>>>>to reduce the compiled size and see if it gets faster.
>>>>
>>>>-Os for size optimization
>>>>
>>>>There are loads of optimization settings and it pays off to
>>>>tune them for your program.
>>>>
>>>>--
>>>>GCP
>>>
>>>Thanks.  Yes I have tried a few combinations including Os.
>>>
>>>Interestingly the best combination so far is not the same for gcc3.0.1 as it is
>>>for gcc2.96. The sizes of the compiled are also revealing
>>>gcc3.0.1    498kB (same optimisations)
>>>gcc2.96     393kB (same optimisations)
>>>MSVC++      308kB
>>>
>>>Something is clearly different in the way these compilers work, which is
>>>intersting, but I do not know enough to suggest what.
>>
>>Intel has a compiler that you Linux folks might want to try.  I know that the
>>purse strings of a Linux user are bound at 100 million PSI, but you could try a
>>*free* evaluation at least, and see how it compares.  I am predicting double the
>>speed.
>>
>>Note that I am not talking about the KAP compiler for Linux (but rather) the
>>Intel C++ compiler 6.0 for Linux (which is now in beta).
>
>Thanks Dan, I may give this a try assuming it works on Mandrake 8.1 as well as
>RH7.1.
>
>Only 100 million psi for the purse strings.  My wife has a much stronger grip.
>The Intel compiler is no doubt wonderful, but I am sure she could suggest better
>uses for the several hundred dollars it would cost.  You guys are obviously
>rich...............................
>
>Frank

Either that, or not married ;-)

Dave



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