3 ms·
Smartphones suffer from input latency too, though I’m unsure of the underlying cause (curious how iOS handles window/view drawing). It only seems to be getting
by mzzter 9y ago
Smartphones suffer from input latency too, though I’m unsure of the underlying cause (curious how iOS handles window/view drawing). It only seems to be getting worse, though I haven’t done tests on this. While each new model undoubtedly has better tech specs, the interface responsiveness doesn’t seem to improve.
- ahartmetz 9y agoGhetto latency test: finger-scroll alternatingly up and down very quickly, see at which frequency your finger and scroll position are 180° out of phase, i.e. you finger is up while the contents are down or vice versa. Smartphones seem to be fine according to that test. Android is very good and iOS is even better.
- mzzter 9y agoHm I get about 4 up and downs per second before the scroll position is 180deg out of phase in Safari on iPhone 7+. That translates to about 125 (1000/8) ms latency?
- ahartmetz 9y agoYes, that is how it works :) That value seems surprisingly bad. My limited experience with iDevices (don't own one) has been that the position of the stationary finger on the page vs. finger on the page while scrolling (another way to measure - unless it is specifically fudged with some kind of prediction to make scrolling feel less detached) is very small. But I can't argue with data. FWIW, I like to test Android in the scroll view of the OS settings app or the address book. Those are well implemented and presumably don't add unnecessary lag.