If you look at bench or conformance here, https://github.com/ivankra/javascript-zoo?tab=readme-ov-file..., you can get an idea of how it compares in some ways

You can embed this one in your Rust programs. No linking to C/C++. All native Rust.

That little 40 mb single binary server you wrote can now be scripted in JavaScript.

This is frankly awesome, and now there are multiple Rust-native JavaScript engines. And they both look super ergonomic.