Maybe this OpenSource can help you. https://code.google.com/p/perfspy/. It is a runtime logging, performance monitoring and code inspecting tool. It uses ApsectJ to weave around your application code at runtime, and logs the execution time of every method and its input parameters and values. It has a UI application, in which you can view the method invocations and their input and return values as trees. With it, you can spot performance bottlenecks and understand complex code flow.
