Love the title. A more common mistake I notice people making is writing code that makes more memory allocations than necessary. # Bad: Makes an extra instan

Love the title. A more common mistake I notice people making is writing code that makes more memory allocations than necessary. # Bad: Makes an extra instantiation of a list with 1 in # it which then needs to be read x = set([1]) # Good x = set() x.add(1) Overall, I think it is important to remember that when you write a program that every step translates to a set of operations. And this applies to all kinds of programming, not just functional programming.