Upgraded grid virtualization is still not great

[Mike Stankovich]

I've been negative about the performance of the grid compared to competing grids like AG Grid or KendoUI in a private ticket. I was very hopeful that my concerns have been resolved, but this is still disappointing.    
https://ej2.syncfusion.com/demos/#/tailwind3-dark/grid/virtual-scrolling.html

You should be able to scroll at a reasonable rate and NOT see the entire visible grid contents disappear/flcker. Slowly scrolling down should be seamless to the user.  

[Santhosh Iruthayaraj]

Hi Mike Stankovich,

We sincerely apologize for the inconvenience caused.

We understand that the current virtualization behavior is not meeting your expectations, particularly in terms of smooth scrolling and avoiding the shimmer effect when data is available locally. We acknowledge the comparison with other solutions, and we take your concerns seriously. Currently, the EJ2 Grid shows a shimmer (mask row) while loading data or rendering pages, including local data with virtualization, to preserve UI consistency without content disappear or flickering.

At this time, we do not have immediate plans to implement this feature. At the planning stage for every release cycle, we review all open features and identify features for implementation based on specific parameters including product vision, technological feasibility, vote count and overall demand. Please cast your vote to make it count. So that we will prioritize the feature request for every release based on demands. We recommend tracking the status of this feature through the feedback link provided below. 

Feedback: Provide the Virtualization Support Based on Row Index Rendering in JavaScript | Feedback Portal

Regards,

Santhosh I