Google's François Beaufort revealed that the search giant uses a robot — build by Finnish vendor OptoFidelity — that measures "end-to-end latency of Android and Chrome OS devices." The video above highlights how the robot constantly taps different sections of the screen to gauge the responsiveness of the display. The web-based tests assist in determining both hardware-and software-related issues, which can then be rectified.

Interested in trying the tests by yourself? Head here.

Source: Google+ (François Beaufort)