Compare drawing settings

Is there a way to compare the drawing settings in one drawing with another?  I have a file that is taking a long time to zoom in and out as well as any panning. What is strange is that other drawings (larger) I open work fine, so it is not a Global setting. Also, if a do a saveas to a new file name and save it to v2010 (our norm) it still is slow zooming. However, I can create a new drawing and copy & paste to original coordinates everything works fine.  Even though this is a work-around I would love to know what causes this, I have another drawing that acts the same way.  One final note, this drawing was created in BricsCAD but worked on in AutoCAD by a member of our workgroup.

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