The building blocks were described even earlier than that: http://www.slideshare.net/bluesmoon/messing-with-javascript-and-the-dom-to-measure-network-characteri

The building blocks were described even earlier than that: http://www.slideshare.net/bluesmoon/messing-with-javascript-and-the-dom-to-measure-network-characteristics http://www.slideshare.net/bluesmoon/messing-with-javascript-... And here: http://www.lognormal.com/blog/2011/11/14/analysing-network-characteristics/ http://www.lognormal.com/blog/2011/11/14/analysing-network-c...