Grid with custom cells that have some expensive calculations doesn't call onPageChange sometimes

Hello, Alexey,

Thank you for the video and for the example.

I have marked the issue in GitHub and the team will look at it and investigate further.

In the meantime, could you please share the calculations that are made for each cell as in general we do not recommend performing heavy calculations inside the cells, as they will be executed hundreds of times.

If you share them, we may be able to suggest a different solution that removes these calculations from each cell, which will prevent the issue and make the application faster.

Regards,
Stefan
Progress Telerik

Well, they are not calculations, but some kind of complex components. I use reakit's composite in order to have cells wide navigations. So I have to wrap each kind of cells with CompositeItems, that registers it's ref to be able to navigate to the previous/above/next/bellow cell. I don't do anything complex and not memoized in render method

https://reakit.io/docs/composite/

Hello, Alexey,

Thank you for the clarification.

Is it possible to share an example of this usage, as this will help us inspect it to see if it can be optimized?

The reason we are asking is that, as the scroll event is async by default and Javascript is a single-threaded language, sometimes with complex operations, the browser may not correctly emit all scroll data. This is why we want to help speeding up the application, as fixing the current issue is not fully in our control and may take longer to resolve. 

Regards,
Stefan
Progress Telerik