I have a ReportViewer that is extremely slow; it renders about 1000 rows in about 13 minutes.

I searched a lot and find this solution to add

<trust legacyCasModel="true" level="Full>

in web.config. It works fine, but my application use dynamic types so I cannot use it.

I have read solutions to resolve this problem in:

https://social.msdn.microsoft.com/Forums/sqlserver/en-US/6d89e2ce-3528-465f-9740-7e22aa7b7aae/slow-performance-with-dynamic-grouping-and-reportviewer-in-local-mode

and tried one, but it did not work, and I did not understand the rest.

• This is a sample of code behind
• aspx code.

Any help would be appreciated.

Thanks in advance.