thanks guys i'm new to mac by the way.
Apple prefers that you not fiddle with the inner workings of the OS. And while we may not really give a fiddle about what large multinational corporations do or do not prefer...
... in this case it really is better to not muck about with the OS to make it "better", "faster", "optimized", etc simply because Apple doesn't care if their updates break these tools or not. Because many developers don't fully understand the workings of the OS (because Apple does not document their portions publicly), etc etc...
Also - the OS is constantly being upgraded, so advice that was good 2 versions ago may now lead to problems.
So - just leave it alone, and it will work really well for you. Don't upgrade the OS in the 1st week after a new version is released, because Apple does make mistakes. Usually I wait until the 2nd version of any new release - so 10.8.2, or 10.7.2, or 10.6.2.
Good Luck...