Measuring Website Load Time

Recently I decided to work on server performance to make your site as soon as possible was loading.
I found a very cool tool that allows us to measure the load time of the site 3 location.

tools.pingdom.com
The tool gives us a preview of the site's load time as well as indicate the elements which should improve.

A sample test result:
https://tools.pingdom.com/#!/dGsAr4/serwerweb.pl

Load time
372 ms

Which indicates that the site is loaded in less than half a second!