Performance Tracking Data using java API's

The performance monitor uses its own memory-based object constructs to track performance and I am afraid there is no way of getting to them through the API. You can, however, right-click on the performance results window and generate an HTML report with all the performance information collected during the run.

You could also register a ServiceSessionMonitor listener implementation with some test instance of the rule server to get notified each time when any function/ruleset starts and finishes its execution, then do your own time calculations and collect relative performance metrics any way you want it.