Lags and lines graphs

I have 2 basic problems. In the object I have designed there are very long delays when rotating the object and Zooming . In addition, there is a problem with viewing the lines as I show in the picture below. I don’t know what’s going on and I need help with both of my problems

How far are you objects from the World origin in model units?

If you provide a .3dm file with a sample of geometry which has problems someone is more likely to be able to help you.

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