In case anyone is not aware: This is a very small sample of microbenchmarks. When benchmarking very simple tasks like these performance tend to vary wildly between architectures.

For instance instructions are assigned to one of a handful of ports when executed, certain instructions may only be assigned to certain ports, what ports an instruction may be assigned to differ between architectures. If an inner loop use only a few different instructions one architecture may be unlucky in that most of the instructions need the same ports, and so it can execute fewer instruction overall.

For real benchmarking use lots of different complicated jobs. It is not perfect, but it is the best way we have of comparing different processors head to head.