Asynchronously rendering the ssrs report from Winforms C#

Dear All,

There are some heavy reports which need to be optimized for performance. Report takes few parameters such as StartDate, EndDate etc from the parameter screen which is in C# win-form application

I want to render this report asynchronously.

Can anybody guide as to how we can render the report asynchronously either in C# or in SSRS.

Thanks in advance.