Compared to Python or Ruby, NodeJS has phenomenal performance. The single threaded argument is also flat out wrong, given that you have clustering or web worker

Compared to Python or Ruby, NodeJS has phenomenal performance. The single threaded argument is also flat out wrong, given that you have clustering or web workers to take advantage of every core. It's also completely misleading even within a single core, as non-blocking nature of JS will accomplish on a single core what otherwise behaves as threading would.