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We are trying to bind nearly 1800 record to the ej:Grid it takes lot of time to load and display the record in browser. The grid contains following features Grouping with Collapse/Expand, multi sorting, resize, column reorder, row reorder, filtering.

Some features are really slow it nearly takes 20 - 30 seconds to process, those are Grouping, Expand/Collapse and column reorder.
Especially, when doing Grouping Collapse/Expand the browser displays "Page Unresponsive" alert message.

Same issue occurs in all the browser, for the record i mentioned chrome here.


I have attached the necessary files (WebForm, json, class file). Please Debug it and let us know the reason.

You can get the full project here: https://github.com/NavinAT/SyncfusionPrototype