First hit for memcpy source code c. The implementation is a while loop that copies one byte at a time. Though many answers make it clear that the actual implementation is a lot faster than copying one byte at a time. Where can I find the real implementation, the real, heavily optimized one that the compiler actually uses? What does it look like in C?
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Not really. I am asking how an existing implementation works, not which library etc. I should use.
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