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Danluu's study seems to conflict with

https://pavelfatin.com/typing-with-pleasure/

which shows Gvim on Windows with a maximum latency of 1.2ms - much faster than 30ms on the vintage Apple //e or TI 99/4. Even Eclipse, which usually feels slow to me, came in at a max of 20.8ms. (1.2ms seems very fast to me as I would expect ~2ms of average frame latency even on a 240Hz monitor?)

Which study is correct? Are both of them measuring touch-to-display latency?

It's also worth noting that those vintage 8-bit microcomputers typically used CRT TV monitors at 30Hz, while modern monitors often run at 60Hz or 120Hz or more (possibly with asynchronous refresh), so they will have lower frame latency.

While I haven't tested it myself, I believe newer iPad/Apple Pencil 2 combinations have improved their input latency (they claim 9ms but I'm not sure if that's actually end-to-end touch-to-display latency in something like Notes or Procreate.)



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