Nice. That reminds me, Carmack tweeted that he could send an IP packet to Europe faster than he could send a pixel to the screen[1], and this is unfortunately true on modern hardware. It's nice that phones are putting the kind of high-speed cameras that can measure this latency into the hands of consumers. Maybe this will allow gamers to put some pressure on hardware manufacturers to reduce the latency that they add to the systems.
I tried to measure the latency of my own system a little while back. I used a digital camera to record video at 240 fps and measured the time it took for a button press on a DS4 connected over Bluetooth to be reflected on a Mega Drive emulator running the 240p test suite. I can't remember the exact latency, but I think it was around 80ms, which is okay, though there is definitely room for improvement.
I tried to measure the latency of my own system a little while back. I used a digital camera to record video at 240 fps and measured the time it took for a button press on a DS4 connected over Bluetooth to be reflected on a Mega Drive emulator running the 240p test suite. I can't remember the exact latency, but I think it was around 80ms, which is okay, though there is definitely room for improvement.
[1]: https://twitter.com/id_aa_carmack/status/193480622533120001