Hi Mark,
Thanks for contacting Syncfusion support.
We are suggesting you the CSG tool and the bundling concept to overcome the loading issue in ASP.MVC application.
1) CSG Tool: We can use the Custom Script Generator(CSG) tool for script file generation instead of using the “ej.web.all.min.js”. Custom Script Generator (CSG) tool to create a single file that packs together only the required scripts and CSS files together. So that you can generate the required script file for the specific controls and hence it will reduce the loading time. Please find the below references.
2) Bundling: Bundling is a feature that makes it easy to combine or bundle multiple files into a single file. You can create CSS, JavaScript and other bundles. Fewer files means fewer HTTP requests and that can improve first page load performance. Please find the references below.
In the above link we have listed out how to do bundling in the CSS files likewise we can bundle the script files also.
Note: Kindly share the list of Syncfusion components used in your page that would help us to further investigation.
Please let us know if you have any queries.
Regards,
Dhivyalakshmi.