[spion]

Thats mostly because Android used to have a really bad vsync/input synchronization before project butter[1] - the system had anywhere between 0 and 16.7ms to render the entire screen (which means easily < 4ms every 4 or 5 frames) instead of having consistent 16.7ms every time.

No matter how fast the components, scroll input events would often happen 1ms before rendering time and a frame would have to be skipped, causing choppiness.

[1]: https://www.youtube.com/watch?v=Q8m9sHdyXnE