Quote:
Originally Posted by SpeedGeek
Getting back to a more general discussion, I think C coders can realize just as much as ASM coders that calling Copymem() for <= 4 bytes is very inefficient (a definite should not do) but there are some lazy coders who will do that anyway.  |
Calling it for anything that takes longer than the necessary number of inlined move operations is inefficient. This is why your typical C compiler will just emit something like that when copying a structure. I am sure there's a break even point somewhere, but that depends on the CPU and cache state.