I had similar problem. I was using spark DataGrid with dynamic columns (
ranging from 12 to 36). I realised that using ItemRenderers in columns was
slowing the app (scrolling was very slow).When I took out itemrenderers, it
seemed to work fine. All columns were number based.
So what I did was, instead of creating itemrenderers, I created dummy
column (1 for each real column), and passed formatted data to those
columns. For sorting, I used custom sort using real columns. This improved
the scrolling performance.
