I've just published an excerpt from my yesterday stream showcasing #Lisp Entity-Component-System framework called cl-fast-ecs: https://youtu.be/oPn5oBMECfY
It shows that the framework easily handles thousands of live objects, and most of the time (around 0.25 ms per 1k objects) is spent drawing them by (non-related to ECS) low-level graphics library, liballegro.