Yes it would be possible to write a C wrapper for my Rust library and link that from Node, however I expect you might lose a lot of performance to data conversion.

I have yet to do the regex engine port, I'm doing that later this evening. I'm porting it from Oniguruma to https://github.com/google/fancy-regex which accelerates common types of regexes using the awesome Rust regex crate which is super fast.

Doesn't rust export the C abi? Or does the "c wrapper" just involve converting c types to rust domain types>

You can very easily export a C api from rust. And fact you would have to if you wanted to write a wrapper anyways so I think the wrapper is probably unnecessary.

Sorry that's what I meant. Just export c ABI functions in a Rust crate.