TESTAPDC2 is a test program for the APDC (Application Profiling and Data Collection) Toolkit. It is used to profile applications and collect relevant performance data. TESTAPDC2 collects data such as processor utilization, memory usage and I/O activity, and provides reports of the performance data that can be used to identify performance bottlenecks and discrepancies. It also provides the capability to compare and contrast similar applications to compare performance characteristics.