Fast software is not the same as small executable. I don't care how many instructions an executable contain, I care about how many are needed to be executed to

Fast software is not the same as small executable. I don't care how many instructions an executable contain, I care about how many are needed to be executed to do what i want. There are plenty of times where a larger executable means faster execution (Loop unrolling is an obvious example). There are plenty of reason why a lot of modern software is slow, but size of executable isn't even in the top 10.