This turned SketchUp Pro 2018 into a legitimate BIM-lite tool. While it couldn't compete with Revit’s database, it allowed architects to export clean IFC 2x3 and IFC 4 files for collaboration.
Use the CleanUp3 extension. Since 2018 handles high-poly counts slightly less efficiently than the newest versions, keeping your model "lean" is key to preventing lag. Final Thoughts sketchup pro 2018