1. A computer-implemented method for instrumenting an application, comprising the computer-implemented steps of: obtaining performance data from instrumented methods in the application; based on the performance data, selecting at least one method of the instrumented methods to analyze in further detail; based on the selecting, determining at least one callable method which can be called by the at least one selected method and which is un-instrumented; and in response to the determining, providing conditional instrumentation for the at least one callable method, wherein the conditional instrumentation specifies a context in which the at least one callable method can be called.