You will hit performance drops not by having many objects in your scene, but while editing complicated objects with the hotspots. That's why you should always reduce the complexity via using an IF structure and GLOB_FEEDBACK_MODE.
Thats because the object will be redrawn and recalculated hundreds of times per second while editing with hotspots. Heavy operations like SEO and REQUESTS, etc. will slow this down. But again, only while editing. The perf of the file overall will not be reduced.
Lucas Becker | AC 27 on Mac | Editor at SelfGDL | Developer of the GDL plugin for Sublime Text | «Furthermore, I consider that Carth... yearly releases must be destroyed»