Oh that's why I get all of the downvotes, finally I understand it.
But you haven't really kept up with Apple and ARM for the past 4 weeks have you? Performance of the A12 is up something like 15% up - which is still impressive if you compare it to what Intel does on a yearly basis - but a lot less than it used to be for Apple SoC's.
In the mean while the latest Qualcomm SoC's (845 is like 35% faster than 835) are performing almost as well as the A11, while the performance gap used to be more than two years.
If Qualcomm manages to get another 35% increase next year their SoC will be faster at least until the A13.
So: - Qualcomm is catching up - While single core and multicore did not improve as much as it used to YoY for Apple
Last years X is still a generation faster than the fastest Qualcomm/Samsung chip today let alone what generic designs ARM licenses to the cheaper chip companies.