When should you break down your JS into more than 1 file? I would think that you should do it when 1 file gets to meet a certain size, but what would be the advantage of breaking it down in the first place since no matter what, it will be the same amount of memory having to be read by the browser...?

Any info on this would be great. I'm sure I'm missing something here as I have one hell of a thick head when it comes to JS...