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Re: faster code for neural network
>> Recently I received the code for a neural network. It is written in
>> standard ANSI-C. However, running it on the Mac gives me a lot of coffee
>> breaks ( it takes 10 min on a IIci, 3 hrs on an LC ). I was wondering if
>> anybody out there has experience with this and knows of ways to make the
>> code faster ( replacing ANSI routines with Mac-based routines.
>>
>> If you are the woman or man with this experience mail me! I really need the
>> help ( it's all for my master's thesis ).
>
>You might want to get a match coprocessor for the LC. The ci has one,
>and that's probably your problem. (I'm not sure if the LC can take one,
>though!) If my memory still works after the two pints I just had, the LC
>has a 68020 without any FPU. You might want to upgrade to an LC III and
>find out if it has an FPU. I believe neural nets use floats, no? If so
>you will most certainly need and FPU if you want decent speed.
>
The LC does lack a FPU, but you can get one on a card. I'm not sure if
this would help though, because it would depend if your compilier would
generate FPU code. I know you can with Think. You also might need to take
into account which compiler you are using for this kind of program, there
seems to be a vairation in efficency between Mac Compilers.
As for using toolbox calls, using Apple's SANE library might help. I
haven't had much experience with it, but it would probably take advatage of
the FPU.
E-mail me if I can help anymore. (I'll run the program on my Q700 if you
just need a quick speed test.)
___________________________________________________________________________
"I want to know God's thoughts...the rest are details."
-- Albert Einstein
_________________________________________
Ron Davis [email protected]
Datawatch, Research Triangle Park, NC (919)549-0711