Preload – is an application that practically pre-loads or better still caches your frequently used applications with the aim of speeding up their load-time. This application that works in the background deploys only unused RAM and does not consume your system memory as imagined.
On Ubuntu you can install Preload with the command:
sudo apt-get instlall preload
or you can download the source code from SourceForge.net
The default settings are just fine.
To monitor your resources used by Preload type the command: