GDBD scrolling performance

I have a view with GDBD on it. I populated the grid with about 120 rows. After that I try to scroll the grid by grabing the scroll bar with the mouse and moving it down. Very first time I do that the motion is very slow and "jerky". After I scroll one to the end of the GDBD any scrolling actions after that don''t have the initial slow down. It appears like some data was cached or soomething after first scroll. How can I prevent initial performance hit on scrolling action?

Never mind, I found the problem.