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A comment on Measuring keyboard-to-photon latency with a light sensor.

Re:Measuring keyboard-to-photon latency with a light sensor by CyberDildonics on Sunday May 31, 2020 @01:37PM (#23371091)
I think it would be worthwhile to test gvim (which is known to have low latency), windows running at a higher refresh rate and a bios shell. I think the USB keyboard input standard itself is not great for latency unfortunately, but it would be good to know where the lower bound is.
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Re:Measuring keyboard-to-photon latency with a light sensor by trishume on Sunday May 31, 2020 @01:50PM (#23371203)
I unfortunately don't have a native Linux install currently, just a VM, and my Windows NUC can only connect to my Z27.

There's some good info here on minimal USB latency, it's less than 1ms and I don't think mine is an issue although the macOS event processing stack might introduce some latency: https://michael.stapelberg.ch/posts/2018-04-17-kinx-latency-...

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