> Would Erlang/Elixir do better? I don't know, but I wouldn't be so sure. Pretty sure it can. Let's give it a try: #!/usr/bin/env escript %%! +P 20000

> Would Erlang/Elixir do better? I don't know, but I wouldn't be so sure. Pretty sure it can. Let's give it a try: #!/usr/bin/env escript %%! +P 2000000 %% run with ./spawn_n 1000000 -mode(compile). main([NStr]) -> N = list_to_integer(NStr), T0 = erlang:system_time(millisecond), Parent = self(), Waiter = spawn(fun() -> Parent ! {final_result, wait(N, 0)} end), spawn_n(N, Waiter), Res = receive {final_result, R} -> R end, Dt = erlang:system_time(millisecond) - T0, io:format("Done in ~p sec result:~p~n", [Dt/1000.0, Res]), ok. wait(0, Acc) -> Acc; wait(N, Acc) -> receive {result, R} -> ok end, wait(N - 1, Acc + R). spawn_n(0, _Waiter) -> ok; spawn_n(N, Waiter) -> spawn(fun() -> Waiter ! {result, 1} end), spawn_n(N - 1, Waiter). And it outputs: ./spawn_n 1000000 Done in 1.613 sec result:1000000 In summary, it started 1M processes, all with isolated heaps, pre-emptable, with only a few KB of stack size. They didn't execute much just sent their result to a collector process and then exited. All in about 5x as fast as C++.