typedef（别名）与结构性能？

Question

Firstly, there are questions about typedef structs vs structs but this is about aliasing, so hopefully it's not a duplicate.

I'm trying to optimize things using SSE2, 4.1, AVX, etc. Is there any difference between this:

typedef _m512 Single

and:

struct Single
{
public:
    Single& operator=(const _m512& InValue);
    operator _m512() const { return Value; }

private:
    _m512 Value;
};

Performance wise?

Answer 1

No, there is no difference in runtime performance between these two compile-time constructs.

They both take zero nanoseconds.