[Known Issue] Civil 3D Performance Degradation
Some Civil 3D users have been experiencing major performance degradation issues causing files to take 5 minutes or more to open. Users that have noticed this issue have reported that plotting is slow and the Purge command is taking up to a minute for the dialog box to open and sometimes an hour for the purge itself to complete.
Autodesk has published a solution for this issue on the Autodesk Knowledge Network. Anecdotally, some users who were dealing with performance degradation issues in Civil 3D have experienced up to 80% improvement after following the update instructions. It’s important to note that not all Civil 3D users are experiencing problems.
To download the update file and find installation instructions, visit the Autodesk Knowledge Network.