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QUERY: IE loads slower than other browsers
From your query we understand that the Syncfusion controls seems to load slower in IE browser when compared with other browsers. Since IE used Trident browser engine it would be slower than the other browsers. But there wouldn't be any significant performance issues in IE browser. If you are using grid control with large data, kindly opt to paging for better results.
Please provide the below details so that we could help in resolving your issue,
1) Please let us know which syncfusion control you are using and also its version details
2) Please let us know if you are facing issue while using any particular feature of Syncfusion control and also let us know the data count you are binding for the control.
If you have further queries, please get back to us.