multi midi

I was playing around with having 1 instrument track and 3 midi tracks under it to save ram and cpu, instead of 4 separate instrument tracks…Look at this screenshot from the options menu and tell me what you see… it seems there is a fair amount of ram being used… what would you adjust to improve the performance??

btw. I have a Mac i7 2 core. 8 g. ram. Should I have that core setting on 2 or something??