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A comment on Computer input latency from 1977-2017 (2017). Parent comment

Re:Computer input latency from 1977-2017 (2017) by m45t3r on Thursday December 03, 2020 @12:18PM (#25291426)
Yeah, this is my favorite gimmick of my Samsung Galaxy S20. 120Hz display+240Hz touch sensor makes everything feels so fast and responsive, this is the first Android device that feels faster than my iPad.
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Re:Computer input latency from 1977-2017 (2017) by andai on Thursday December 03, 2020 @12:24PM (#25291526)
Does a 240hz sensor help when the display responds at half that rate?

I guess it's because the latencies stack on top of each other?

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Re:Computer input latency from 1977-2017 (2017) by kllrnohj on Thursday December 03, 2020 @01:31PM (#25292567)
It's quite common for the touch panel to run at 2x the display refresh rate. Eg, 120hz touch panels have been quite common for years on phones despite the 60hz disply.

It helps both slightly with latency directly, but it also gives you more points to sample from for input prediction which then helps with latency even more. Or for things like drawing applications it'll give you smoother curves assuming the drawing app looks at all intermediate touch samples.

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Re:Computer input latency from 1977-2017 (2017) by setpatchaddress on Thursday December 03, 2020 @01:07PM (#25292218)
out of curiosity, which iPad?
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Re:Computer input latency from 1977-2017 (2017) by m45t3r on Saturday December 05, 2020 @09:25PM (#25320470)
It on iPad 6. I think if I had an iPad Pro (that also has a 120Hz screen I think?) it would be the same.
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