Pooling is indeed what the ECS I use (entt) basically does--every component type has a contiguous pool of instances. Compiling Go to C++ lets me use entt among

Pooling is indeed what the ECS I use (entt) basically does--every component type has a contiguous pool of instances. Compiling Go to C++ lets me use entt among other things (target all of C++'s targets including Wasm, have some types of metaprogramming like statically reflecting all component types, etc.). The GC thing is just one of the results. There is no comparison for the amount of control you get vs. vanilla Go (where things can escape to the heap "whenever").