Defects in Civil 3D (Civil 3D performance)

If you experience that the opening and saving of Civil 3D files are extremely slow, try to install Performance Degradation Fix, see link below for details:

https://knowledge.autodesk.com/support/autocad/troubleshooting/caas/simplecontent/content/autodesk-autocad-civil-3d-performance-degradation-fix.html