We've had reports of slow performance in AutoCAD 2011 when selecting and deselecting extremely complex or dense hatch patterns. The symptoms are that you select a hatch pattern and your cursor freezes for several seconds before you are able to move it again. Sometimes you also see the "thinking" cursor (or what I call the "Blue Wheel of Pain"). The same symptoms repeat when you deselect that hatch pattern.
Typically, this behavior is related to the ribbon and the hatch preview capabilities offered by the contextual hatch ribbon panel. One workaround is to change to the AutoCAD Classic workspace (which, by default, does not use the ribbon) and restart AutoCAD in that mode. In most cases, customers experiencing this issue see immediate and noticeable performance improvements.
Note: Restarting AutoCAD after switching to the Classic workspace is usually necessary to properly clear memory of any caching the ribbon may have done.
The following solution has been updated to include this and other information relating to improving hatch performance:
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(command "HPQUICKPREVIEW" "off")
Fixed this for me.
Posted by: CAdkid | February 07, 2011 at 02:09 AM