Issue Description
As projects evolve, they naturally become more and more complex and detailed. Approaching deadlines might also shift the focus from precise modeling to getting the job done. These might result in heavier files than necessary, which can slow down your Archicad experience. It is a good practice to check the health of your projects from time to time.
Solution
This article presents some tips and tricks on how to achieve a balanced BIM project that performs well.
How to Optimize Your Project Performance - Graphisoft Community