ListView scrolling is 'jumpy'

When scrolling a ListView the scrolling is not smooth, but the list 'microjumps' every now and then. Jumps are especially easy to see when the scroll speed is decelerating.
cacheBuffer or -opengl do not affect the 'microjumpiness'.
Find attached a simple example to demonstrate the effect. just scroll the list up and down with different speeds.
If one sets QML_SHOW_FRAMERATE on one can see the following pattern in the output:

paintEvent: 0 time since last frame: 15
paintEvent: 0 time since last frame: 16
paintEvent: 1 time since last frame: 16
paintEvent: 1 time since last frame: 3
paintEvent: 0 time since last frame: 12
paintEvent: 1 time since last frame: 16
paintEvent: 0 time since last frame: 15

Not sure, if that (3 or sometimes 2, since last frame) is causing the jumpiness.