datatable addspan & hover property

dear webix Team

I composed the screen with the script below.
However, it seems that the response speed of hover or selected is slow.
Is there any way to improve it?
The grid consists of 30 to 40 columns and 600 to 3000 rows dynamically.

code snippet : https://snippet.webix.com/98ovtllp

Hello @kor_osh ,
Unfortunately there is no way to achieve such result, In this case, we can not offer anything to improve the response speed . The main problem here is in spans, and nothing can be done with this.

oh… Ok thank you @annazankevich