No I meant that the only difference between a move and a copy under the hood is that the compiler can assume the destination memory overlaps the source. If the

No I meant that the only difference between a move and a copy under the hood is that the compiler can assume the destination memory overlaps the source. If the struct is large that might mean using a memmove instead of memcpy. I don't think aliasing the this pointer matters, since it's the pointed-to memory that could be aliased. But I'm not sure if that's actually faster or if any compiler utilizes the semantic difference.