What kind of question is that? Of course fast > slow where all else is equal, the problem is that that isn't the case. I made more than one point regarding the

What kind of question is that? Of course fast > slow where all else is equal, the problem is that that isn't the case. I made more than one point regarding the use of FP style where applicable and there's others as well (including maintainability which is a huge money hole). Whether or not you think the performance implications are worth the benefits is a personal, contextual decision. But you just grossly misrepresented the entire point by saying that both styles are equivalent except that one is slower.