Author: Dieter Buerssner
Date: 11:49:21 05/12/03
Go up one level in this thread
On May 12, 2003 at 14:43:00, Tom Kerrigan wrote:
>On May 12, 2003 at 10:38:57, Fermin Serrano wrote:
>> Question 3:
>> -----------------
>> To copy a structure into other, what is faster, doing by copy each of his
>>elements or use a memcpy?
>
>Use memcpy. It may not be faster on your system, but it's optimized on other
>systems that you might use later. If you copy individual elements yourself,
>there's no chance it will be optimized on any system.
I don't agree. Use the assignment operator ("=")! It should never do worse than
memcpy or copying individual members. On many compilers, it will make no
difference (especially compilers that inline memcpy). I can see, that memcpy can
produce worse code (depending on struct size). I really cannot see, that with
any decent compiler the very obvious and clear assignment can produce worse
code.
Regards,
Dieter
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