Inter-process communication is much, much slower than a native function-call. (Native function calls are almost free, especially on modern CPUs which are very g

Inter-process communication is much, much slower than a native function-call. (Native function calls are almost free, especially on modern CPUs which are very good at dealing with them.) Spinning up a whole new process is vastly slower still, taking (iirc) hundreds of thousands of instructions. > so long as it was done within a promise. I don't see how it would help things to wrap it up with concurrency abstractions. That won't make the cost go away.