I can confirm that there is indeed a large difference in memory usage. On my computer, I run a distributed computing client program in the background called Prime95, which is used to testing very large Mersenne numbers (2^p-1, where p is prime) for primality. (mersenne.org) Usually, whenever I am playing RS, the program slows down a lot, and when I try to bring up its window, it half-freezes. With this new update, the program no longer freezes! Yay! :)