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A comment on Amazon Ion – A richly-typed, self-describing, hierarchical serialization format. Parent comment

Re:Amazon Ion – A richly-typed, self-describing, hierarchica... by dan-robertson on Saturday November 20, 2021 @05:37PM (#29292465)
The link I posted was 2017. The site you link gives quite different ratings. I assume partly it is different methodology (the site you link tries to account for key travel somehow and they do something with a display and try to account for display latency rather than using a logic analyzer), but I’m not really sure. For some keyboards in common:

- apple magic keyboard (? vs 2017) 15ms vs 27ms

- das keyboard (3 vs S professional/4 Professional) 25 vs 11/10ms

- razer ornata (chroma vs chroma/chroma 2) 35 vs 11.4/10.1ms

Interestingly it is not some simple uniform difference: the Apple keyboard does much worse in the rtings test, perhaps getting not much of a bonus from key travel compensation. But the das keyboard vs the razer that are 10ms apart on my link perform equally on rtings (but maybe I found the wrong model). I don’t have a good explanation for that discrepancy.

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Re:Amazon Ion – A richly-typed, self-describing, hierarchica... by danachow on Saturday November 20, 2021 @10:09PM (#29293849)
I know it is 2017, but that is a very long time in the gaming/mech keyboard market. I remember just about 10 years ago when mech keyboards were a niche for weirdos and a few others that swore by their Model M's - you now can buy these in Walmart. The point about discrepancy is well taken* but I think the bigger point is on the rtings list the number of offerings that are an order of magnitude lower latency - such that the methodology used in your link is not even viable.
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Re:Amazon Ion – A richly-typed, self-describing, hierarchica... by dan-robertson on Sunday November 21, 2021 @05:26AM (#29295314)
Why is using a high speed camera and a logic analyzer less viable than measuring the end to end latency and trying to subtract the computer part of it? Or are you suggesting that a solenoid should be used to press the key instead of a finger?
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Re:Amazon Ion – A richly-typed, self-describing, hierarchica... by danachow on Sunday November 21, 2021 @08:16PM (#29301600)
The latter. Even the linked article points out the inherent limitations.
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