Google has access to some pretty interesting resources, and it puts these to good use. A video of how the Chrome OS team tests the responsiveness of the mobile browser has made an appearance; and it involves a machine with the suitable inappropriate name of Touchbot.
The Chrome Touchbot is a robotic finger simulator that will poke and swipe at a smartphone display. The smartphone itself will be running the Chrome browser set to a specific latency test website. Naturally, Google has also shared the link for the latency tests for everyone to try out on their own. While the video shows the Touchbot moving at a leisurely pace, the actual test was shot with a high speed camera.
In addition to sharing the video, Google has also made the source code for the Touchbot public and available for download. Possibly so others will be able to build their own smartphone display testing rig. It shouldn’t prove to be too difficult; all one needs is a stack of robotics and some engineering capability.