Simple! Just point your browser to this address: http://loads.in/

input your website’s URL and click away…

You can even view the progression of the page being loaded at the earlier times before its full-loaded. Quite nifty, no?
This is very useful if you’re developing sites for wider audience with slower internet connections especially in developing countries. If it takes ages to load, you will scare many potential customers away and never to return to your site again.