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Large Databinding to Calendar
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Vishal asked on 16 Dec 2020, 07:22 AM


We have more than 5000 records in calendar.

Currently if we bind all data together then scheduler takes almost 2 mins.

so avoiding load and bind time, we need to bind data on every view change. 

For e.g. By default month will be current month and when user navigate to next or previous month, we need to bind data and that way it will reduce the bind and load time.

We have used our custom api for read operation but found that when we change the view, it is not working as expected.

When we navigate and rebind the data, then it is not calling our read api with startdate and enddate.

How we can proceed further?


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answered on 17 Dec 2020, 12:18 PM

Hi Vishal,

As you have noticed, loading such a large number of events causes performance issues and it could lead to a crash in the browser. The reason for that is the huge amount of DOM elements, which are processed by the browser JavaScript engine.

With regard to the performance hit when multiple resources are used you could check the following thread, in which this issue is discussed and an approach consisting of requesting only the data for the visible days from the server (implementing server filtering) is suggested. 

This is demonstrated in the following example: 


In addition since with R2 2020 the Kendo UI for jQuery Scheduler now comes with built-in virtualization when scrolling vertically. This helps improve scenarios where a large number of events are found within the Scheduler.

You could refer to the following resources for more information about Scheduler virtualization: 


You may also find the Performance Issues article in Kendo UI documentation useful.

I hope this helps.

Please don't hesitate to contact us again if a specific issue pops up or in case you have other feedback or questions related to Kendo UI components.

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