I think they became stable in v12. I'm actually not sure about the internal implementation, but from user's point of view you can pass almost [1] any value via

I think they became stable in v12. I'm actually not sure about the internal implementation, but from user's point of view you can pass almost [1] any value via a message and you will get a copy on the other side. You can even share memory between threads with SharedArrayBuffer. [1] https://nodejs.org/api/worker_threads.html#worker_threads_port_postmessage_value_transferlist https://nodejs.org/api/worker_threads.html#worker_threads_po...