4 ms·
Typical average latency of keyboard and monitor combined is about 26 ms 'typical' might be a bit of a stretch here: I doubt that without tuning settings on a s
by stinos 5y ago
Typical average latency of keyboard and monitor combined is about 26 ms
'typical' might be a bit of a stretch here: I doubt that without tuning settings on a standard OS like Ubuntu/Windows and with your typical 60 or 75Hz monitor it's possible to achieve numbers this low (I've measured software->monitor latencies, good luck getting lower than 2 frames, and that's excluding input and processing). Anyway since this is largely theoretical, what would be really interesting here to actually measure this with external hardware and see what the actual numbers are. Think 2-channel oscilloscope, channel 1 probing keyboard key activation and channel 2 measuring a photovoltaic sensor taped to the screen. Anyone did that already?
- diggan 5y agoSimilar idea, but instead of probing the keyboard keys, it has a mechanical arm + takes a high-framerate video of the keyboard + screen to measure the latency. Not automatic like yours would, but probably wouldn't be hard to use different software (they seem to be using a game, you could write an application that instead flashes bright white/$color) and then process the video to get the start/end time of the measures. https://www.rtings.com/keyboard/tests/latency https://www.rtings.com/keyboard/tests/latency Edit: This seems even closer to what you were suggesting: https://thume.ca/2020/05/20/making-a-latency-tester/ https://thume.ca/2020/05/20/making-a-latency-tester/
- rowanG077 5y agoNvidia has something like that. https://developer.nvidia.com/nvidia-latency-display-analysis-tool#:~:text=LDAT%20is%20a%20discrete%20hardware,with%20GPUs%20from%20all%20vendors https://developer.nvidia.com/nvidia-latency-display-analysis....
- NathanielK 5y agoOnce you start using high speed sensors taped to the screens, you starting noticing how slow LCDs are. It's a lot slower than the marketing wank says. [0] [0] https://www.youtube.com/watch?v=MbZUgKpzTA0 https://www.youtube.com/watch?v=MbZUgKpzTA0