Use Flame Graph to identify hottest code paths of an application. The width of
each function indicates the percentage of event samples of the function (it’s
callees) to the total number of samples of selected process and thread for a
specific event.
Figure 1. Flame Graph
Use Top-Down Callstack to analyze any issues with call-sequence flow of the
application and to analyze the bottlenecks in functions and its callees.
Figure 2. Top-Down Callstack