I run DirSync Pro and then do nothing - i.e. leave it on main screen showing the list of jobs - it's not doing anything but if you look at the windows Process Monitor you can see that it is continually using up memory (200MB+) and CPU is around the 25% mark. If you minimize the application then the memory usage goes all the way down to around 8MB. Once you double click on the system tray icon to restore the application the memory usage starts to go up again and CPU is around 25%.
DirSync Pro ver 1.45b2