Preload is considered to be read-ahead daemon application as it analyzes the applications which user runs, and on the basis of this analysis it predicts which applications user can run next time and launches these applications in RAM. Its daemon keeps running in background all the time and saves the required information about the applications you are running so that it may load them quickly next time.
Lets see how we can install it Ubuntu, first of all launch the terminal from Applications > Accessories > Terminal.
Once termianl is launched, simply run following command:
sudo apt-get install preload
It will be installed instantly. Now it will run in the background and will keep track of the applciations you run. Don’t worry about the memory since it does not drain much of your system resources. To stop it simple run following command in terminal.
sudo /etc/init.d/preload stop
and to start it again, type :
sudo /etc/init.d/preload start
Thats all, you will now see drastic changes in your system performance with Preload. Enjoy!