Hello ilywanzi,
I would like to suggest you try to improve the speed of the initialization on the jqxGrids separately and after that trying with other options.
Meanwhile, I think you could try to open each one card one by one but this is only thoughts.
Could you provide us with more details about these grids?
Also, I will try to suggest a few things that you could try.
The jqxGrid has the virtualmode
option where the data is loaded on demand.
Another way, that you could try is to create the first grid normally and the second one in the ready
callback.
Each one next grid in the same way.
Best Regards,
Hristo Hristov
jQWidgets team
https://www.jqwidgets.com