In addition to what others have said, the choice of memory management schemes has big knock-on effects. It influences how much runtime metadata you need to reta

In addition to what others have said, the choice of memory management schemes has big knock-on effects. It influences how much runtime metadata you need to retain (e.g. stack maps), it has lots of implications for the FFI, and may constrain various tricks like unions, tagged pointers, NaN boxing, etc. So narrowly comparing schemes in terms of just allocation throughput won't paint the whole picture.