So before to optimize, we need to investigate.
Bootchart is a way to show the boot process, in the end of the boot, you will get a chart, that shows the process.
To install on ubuntu
The chart generated from the boot process, is stored in /var/log/bootchart. It is a png image.sudo apt-get install bootchart
So the result that I get, from my setup
It is one thing to know, now, how to optimise it?