WebPageTest allows users to run multiple different site speed tests, using real browsers and reflective connection speeds to give you a better idea of how your sites are performing. Choose the browser you are looking to test and the geographic test location, to give the most accurate insights into how visitors experience your site. The comparison tool allows you to pit your site against URLs you specify, with results presenting in a visual way so you can easily see how you stack up against the competition. Running tests is free of charge, and the forum is a great source for learning more about optimising your performance for different browsers and devices.