Tyler Loch's video: RetroArch Emulator Lag Test - Next Frame Response Time

Using RetroArch in Linux KVM mode and a CRT, I was able to get sub-16ms lag, and prove next-frame response time! My specific test uses Pitfall! for the Atari 2600 on the Stella core. This video was taken at 240fps on an iPhone, and slowed down further for demonstration purposes. Easy for anyone to do, as long as you have a smartphone and a computer! No fancy wiring or lights required to test your own setup. Just put the controller in front of your phone while taking a slow-mo video, and hit a button! Count slow-mo frames (use math to compare to 60fps at realtime) on a computer. Full specs: CPU: i5-5675C Graphics: Intel Iris 6200 OS: Ubuntu 17.04 Latest RetroArch Nightly Display: Random DisplayPort to VGA adapter Extron VSC 500 (not required, but makes my VGA 240p signal look nicer) VGA to circuit feeding CRT jungle chip Sony Trinitron TV Linux Settings: Custom 1920x240p EDID via DisplayPort RetroArch launched in KVM mode through basic command-line (not GUI) Linux RetroArch settings: VSync On Maximum Swapchain Images: 2 Frame Delay: as high as you can go without stuttering. 15 works for me for 8-bit systems Integer Scaling No filters Input device Super Famicom controller Dual SNES controller to USB adapter - V2, configured to 1ms of lag. Website specs say 2ms minimum, but hey, 1ms was an option in the controls, and Linux reports 1ms poll time…