There are some of us who are obsessed with speed. If you are among people who are always searching for hacks and tweaks to boost the performance of your linux system, this is your lucky day.
While you can always go for light-weight distributions and use command line applications…. That option simply doesnt get down the throat for a modern user with ram size in gigabytes, who is well equipped with modern hardware. The solution lies not in cutting down on functionality or visual appeal, but rather on intelligent optimization of resources and this is where comes the role of Preload.
Preload is one of the most intelligent and powerful ways to speed up your system. What is does is simple to understand conceptually. It runs in background and analyzes what programs are used most often and then pre-fetches them according these pre-analyzed patterns. Yes, it makes a good use of idle ram and is ideal for modern desktops which have ram in plenty.

Users should not however expect an immediate performance boost after installing the software. Preload takes its time to analyze the application usages and aggregates all these data to develop a consistently evolving usage pattern. So performance should improve gradually.

Installing in linux/debian is breeze :

sudo apt-get install preload

should do the job. For others, here is official downloads page.