Node has always supported native addons, and since 2017 it also provides a stable ABI making the process a whole lot easier[1].

That said, in my own experience it was seldom worth it to rewrite something in C++ for performance sake. After rewriting some computationally heavy part as a native addon, I often ended up gaing only ~20% more perfomance at best when compared to properly optimized JS implementation, and even that was not guaranteed since V8 improved rapidly. That was not a good enough reason to keep a whole different tool chain around, so I'd end up going back to JS.

[1] https://medium.com/netscape/javascript-c-modern-ways-to-use-...