Scroll view performance issue

Unity Engine
1

Hi,

I used the Scroll View container to create a table with 1000 elements at runtime. When I am not scrolling the frame rate is really high but when I scroll the frame rate drops a lot. Please see attached pictures for reference.

5406369--548961--Screen Shot 2020-01-24 at 4.49.33 PM.jpg
5406369--548961--Screen Shot 2020-01-24 at 4.49.33 PM.jpg3580×2200 1.03 MB
5406369--548964--Screen Shot 2020-01-24 at 4.50.04 PM.jpg
5406369--548964--Screen Shot 2020-01-24 at 4.50.04 PM.jpg3574×2194 1.07 MB

Could you please explain why this would happen? I thought UIElements reuses elements in a scroll view.

2

ScrollView is not virtualized. ListView is the virtualized one. That said, it will only virtualize elements vertically, not horizontally. So if you have a lot of columns, the cells for the visible rows will still all be created for each column.