i have multi select control in form with about 20000 records , when i click on control every time it takes about 10 seconds
is there any solution to reduce the response time
You can check out the virtualization feature.
Demo - https://demos.telerik.com/kendo-ui/multiselect/virtualization
Documentation - https://docs.telerik.com/kendo-ui/controls/editors/multiselect/virtualization
Let me know if that would be useful.