gluon

Marshalling values between Rust and Gluon requires minimal boilerplate, allowing functions defined in Rust to be directly passed to Gluon, as demonstrated in the embedding examples.

Static typing with Hindley-Milner type inference reduces explicit annotations while ensuring safe interfaces, making it easy to write correct and efficient code.

Built on Rust's guarantees, Gluon allows multiple programs to run in parallel, though it's a recent feature and may have issues like deadlocks as noted in the README.

With a small footprint and separate components, Gluon is designed to be easy to embed and learn, prioritizing minimalism as stated in its goals.