We all want our Joomla websites to perform well. How to get there is sometimes a mystery. The quote, "You can't improve what you don't measure," has been used often in almost every field, from management to sports. If you want to make something better, you better know where you're starting from. There are plenty of website tools out there, and many of them are free. In this article, we'll be taking a look at one that we've already referenced in previous articles. GTmetrix.com is a site that you should know about if you don't already, but be careful, it can be addicting.