No, JS runtimes don't do "fine" with concurrent operations, unless you are "waiting". If you are doing heavy processing, the whole service freezes. That's indee

No, JS runtimes don't do "fine" with concurrent operations, unless you are "waiting". If you are doing heavy processing, the whole service freezes. That's indeed the primary reason I need worker threads. Erlang's runtime does "fine" with its preemptive concurrency model, JS runtimes are a joke in this regard.