10-02-2014, 06:03 AM
I have to say I don't understand his solutions to the problems he gives. He takes a generic data structure with a function on it, and he breaks it down into a specialized structure with a specialized algorithm. But there's never just one algorithm for the data. You have data and you have several algorithms. At 32:16, he has a GameObject class with an updateFoo() function in it. Then he goes on to redefine the updateFoo() into a global updateFoos() function that takes a struct that has partial GameObject data as input and another struct that has *some* of the same data as output (37:16). So he can apply foo really fast, but before doing that, he has to fill in these In and Out arrays, or he needs to have them somewhere pre-stored. filling in is obviously not an option, because that would just negate any cache improvements he just won hard. Pre-stored is not an option when the input and output formats differ and you are doing the operation several times. Add to the mix that usually you're doing more than just one operation on the GameObjects' datas, and I just don't see how it could possibly work outside of very specialized cases.