Page load time is really important for getting the new visitor and for maintaining the older ones. You can access the tips for increasing the page load time in my article
Here we are talking about the tool for checking the page load time. Below is the link for the tool where you need to put your domain name and then it will show you the time taken for loading that site.
It mainly concentrate on the size of your webpage, so if you reduce the size of the webpage by using GZip then definitely the page load time will reduce for that particular domain.
We will update you about the same kind of development thru our feed.