A computing device is provided, including a processor configured to execute an application-under-test including a plurality of tasks. Each task may be executed in one or more task instances. The processor may determine respective performance data for the one or more task instances of each task. The processor may output, for display on a display, a graphical user interface (GUI) including a statistical representation of the performance data. The processor may receive, at the GUI, a selection of a task executed in a plurality of selected task instances in the application-under-test. The selected task instances may be executed in selected task execution time intervals that are at least partially non-contiguous in time. The processor may generate an aggregated view of the corresponding performance data for the selected task instances aggregated over the selected task execution time intervals. The processor may output the aggregated view for display at the GUI.