Performance of new garbage collector in IL2CPP?

Unity Engine
1

Does IL2CPP bring new garbage collector on mobile (iOS, Android)?
Is there any benchmark comparing with the gc of mono?

2

IL2CPP uses the same GC as the rest of Unity. It is a slightly newer version of that GC, which brings some bug fixes, but it does not change the performance characteristics.

3

Is there any plan to improve or replace the old gc? Lacks of generation characteristic making game easy to hiccup.

4

Yes, we’re planning to have a new GC (probably with generational GC) have the upgrade of the new Mono runtime is complete. We don’t have an official release date yet though.