Got it. Maybe I always naively assumed there is some shallow FFI layer and all the heavy lifting is done by some set of core standard libraries. Ideally portable to multiple environments.
Deno doesn’t use it, though. They use Rust ecosystem libraries like tokio. [2]
[1] http://docs.libuv.org/en/v1.x/ [2] https://choubey.gitbook.io/internals-of-deno/architecture/to...