Issue about loading a large amount of data

Recently,We tried to import a large of practical data,But when the nodes’ count up to 300 and links’ up to 300,it took a very long start-up time about 20s.
Our aim is to load more than 10,000 nodes and links.
Are there some tricks to solve this problem?using OpenGL or DirectX engine?

I suggest that you read the “Performance considerations” section of the GoXam Intro PDF document.

Basically, to avoid too long start-up times, you’ll need to implement virtualization.