Experience (with this style of development) helps out here. For stuff you're completely clueless on though, it still happens. And that's when you revise your de

Experience (with this style of development) helps out here. For stuff you're completely clueless on though, it still happens. And that's when you revise your design. Its far better to go in this direction than the other, in terms of code clarity, and it's pretty rare to have it impact performance... at all, as long as you're willing to go back and rewrite the ideal code to be a bit more practical when you notice an issue.