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Why is the graphics layer block very laggy unless I add `compositingStrategy = CompositingStrategy.Offscreen` ? There is only `translationY` modification in the block. It even happens for a very simple nonlazy scrollable layout in release mode.
I inspected the HWUI render bar, there was no overhead, all lines were under the yellow line, without `Offscreen`. I wonder which causes the lag.

Or is it the problem of custom overscroll? I can see there is a small discontinuity of time when overscrolling.

I think it's a problem of `applyToFling` , when the content already reached boundary, `performFling` will still give a nonzero velocity, which is expected to be zero.