Issue
You want to know how to improve performance in large, complex drawings containing hatches.
Solution
Here are a couple of the most common performance issues relating to hatches.
Performance Issues when Previewing
AutoCAD 2011 (and AutoCAD-based vertical products) default to showing a preview of hatches as you move the crosshairs over an enclosed area:
The automatic preview of hatches can cause performance issues in large, complex drawings. You can disable this feature by setting the HPQUICKPREVIEW system variable to OFF.
