Many Linux distros (& course all versions of Windows) pre-load certain components of popular application programs to make them appear to run faster. It is also common in Linux to implement a pre-linking mechanism which substantially improve performances of application programs.
With SXCE (I am currently running Build 65, the newest), I have noticed improvement of the loading times of Firefox and Thunderbird after several power on/off cycles. This message posted from opensolaris.org
