dg2 performance issues

[andrew at midwestcoastmedia.com]

I'm experiencing a big degradation in performance with dg2. I have a  
datagrid with a 224x119 image and two text fields. Slow scrolling  
using dg1 (8.1.8) is silky smooth but slow scrolling using dg2 (9dp11)  
is jittery at slow speeds. This isn't as noticeable with faster whip  
scrolls but looks jerky when just perusing. Am I missing a setting  
somewhere?

Same stack code, compiled with different engines:
https://midwestcoastmedia.com/files/dg1_scroll.mp4
https://midwestcoastmedia.com/files/dg2_scroll.mp4

So I don't seem ungrateful I would like to say that I LOVE that the  
old clunky looking default scroll indicator is gone. Thanks!

--Andrew Bell