4 ms·

Hm 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 late

• ahartmetz 9y ago
  Yes, 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.