C pointers vs direct member access for structs

Question

Say I have a struct like the following ...

typedef struct {
  int WheelCount;
  double MaxSpeed;
} Vehicle;

... and I have a global variabl

Answer 1

In general, accessing the struct directly would be quicker, as it won't require an extra pointer dereference. The pointer dereference means that it has to take the pointer (the thing in the variable), load whatever it points to, then operate on it.