added this to post in link.
Using preloadPreload caches the most accessed applications on your disk and memory.
Preload should not be installed on systems having memory less than 1GB, otherwise, it would not have any effect, or rather would advesly affect the performance.
To install preload: use terminal: sudo apt-get install preload
Once installed, preload will automatically start during boot. It normally takes 20-30 launches of a program to start being cached by preload.
more info: http://techthrob.com/2009/03/02/drastic ... h-preload/