Which method do you expect would have better performance when stressed? It's a 2D tile map where the camera has view of a small portion of the map. As I pan up/down/left/right, should I be adding and removing tiles from the stage as needed? or have them loaded, offstage, and just change their x/y coords as needed?

I'm using AS3 to code this and I have it working fine. And I know it's not wise to try to optimize early, but since I'm very new at this, I thought maybe someone already knows if one is usually better.