Qt Creator provides the QML analyzer, which lets you perform a runtime analysis of your Qt applications. You can see a graph (in time) of how your application is running, as well as dive into the details about how your application spends its time drawing, binding to variables, and executing JavaScript.

Qt Creator also integrates well with Valgrind on Linux, letting you look for memory leaks in your application. Using Valgrind on Linux, you can see the blocks that were allocated but not freed, and more importantly, see how big they were and where they were allocated in the code, giving you a head start in determining why they were not freed.

In the next chapter, we will turn our attention from specific parts of Qt Creator to one of its most exciting aspects in general: the ability to use Qt Creator to compile and test applications for mobile platforms such as Google Android.