Returns the average amount of time that the GPU spent rendering frames during a 0.2 second time period. This average is computed 5 times per second, and the result for most recent 0.2 second period is returned.
This Blueprint can help you to analyze the performance of your apps so that they are maintaining frame rate consistently. It returns the average amount of time that the GPU spent rendering frames during the most recent 0.2 second time period (as described above).
This function works on supported mobile platforms.
For more information about optimizing your apps (not specific to UE4), please see VR Performance Optimization Guide.