Which one is more efficient...???

Question

++x, x++ or x+=1

Answer 1

++x is technically more efficient because it isn't creating a copy of itself, unlike x++ which creates a copy of the unmodified value and then increments. However, the difference between the three is incredibly minute (only a few clock cycles in the CPU). No matter how many of of either you put in your code you will never have any kind of meaningful performance impact.