How to show nodes by viewBounds?

Hi,for up our <SPAN id=result_ lang=en =short_text><SPAN =hps title=点击可显示其他翻译 closure_uid_hx2f3b=“84”>performance of viewer.I want to bounds nodes by Diagram.ViewBounds.

Is there any method to solve the problem??
Such as, is there any Caching mechanism to the Diagram??
It can auto Hide the outer nodes so the application will run faster??

I’m not sure exactly what you are suggesting, but it sounds like what GoXam does automatically.

Have you read: performance considerations?