Slow Flow Diagram Performance

I have a prototype file that has only 2 pages. One is a blank page with minimal objects, the other page is a flow diagram. The flow diagram is real slow to work with, not sure if it is because there are so many objects (squares, shapes, connectors, etc.) or not. But is there anyway to increase the performance? I notice the slow down the most during scrolling , moving objects around, and connecting to objects.

When I select all it says:

  • 29 group properties
  • 259 shape properties…

hope that helps.