A couple of weeks ago I looked into the behaviour of the Compress Options to find out exactly how they interact with AECOsim Building Designer. This investigation produced the following four items.
I was surprised to find out how little the User Preference 'Compress on Exit' actually does. Batch Processing using the Compress Commands is a far better approach to purging DGN files.
What does 'Compress File on Exit' do?
Compress Options
Compress Options in AECOSim Building Designer - Behaviour and Configuration
Compress Options can affect Drawing View performance [in AECOsim Building Designer]
Creating a Deployment Image for AECOsim Building Designer
Batch Update of Cached Visible Edges (CVE) in AECOsim Building Designer [essential reading #1]
Drawing Rules, Auto Annotation and performance [essential reading #2]
Managing dgnlib files [in AECOsim Building Designer]
Message Center - Saving Additional Information [useful when troubleshooting]