Linux, for better or for worse, doesn't have universal support for VSYNC. Without it, you can race the scanout and minimum latency can get well under 1ms. Thi

Linux, for better or for worse, doesn't have universal support for VSYNC. Without it, you can race the scanout and minimum latency can get well under 1ms. This was required for me to get a video stream down below 1 frame of latency.