> But the method itself has still got a much slower throughput than a tracing GC, when used in a similar manner That is correct, but the issue is not with refe

> But the method itself has still got a much slower throughput than a tracing GC, when used in a similar manner That is correct, but the issue is not with reference counting, but rather with having unnecessary extremely frequent RC/GC operations. Once frequency is reduced to only necessary operations (which could be none at all for many programs), reference counting wins since its cost is proportional to the number of operations, while GC has fixed but large costs.