Good collectors are language independent. Bad collectors like Mark & Sweep are just needed for stable extern pointers, like in ffi callbacks. All better langua

Good collectors are language independent. Bad collectors like Mark & Sweep are just needed for stable extern pointers, like in ffi callbacks. All better languages use a modern copying collector, if they have enough memory. It's also compacting, and doesn't stop the world. I think lisps just do mark & sweep on phones or embedded, and the mentioned ffi callbacks.