Here you have 2 examples:
1. Advanced Data Grid, big ammount (~100) of simple columns
(no column groups), big ammount of rows (~1000):
Horizontal scrolling in slow, but acceptable, vertical
scrolling is slow, but acceptable
2. Advanced Data Grid, big ammount (~100) of simple GROUPED
columns, small ammount of rows (~100):
Horizontal scrolling is fast (even faster than in ex. 1),
vertical scrolling is dramatically slow!
No custom renderes are used, just a simple grid. No dynamic
objects are used.
Could you please provide with workararound for example 2.
Advanced Data Grid tuning advices are much appresiated as well.