Context

Our Python C Extension modules are difficult to maintain and require vigilance to avoid memory leaks. We should investigate using Rust for the existing C extensions. We could wrap the Rust BSON crate for the heavy lifting in our BSON code, and do a straight port of our cmessagemodule code.

In the spike we would need to wrap a subset of the BSON types and compare the encode/decode performance of the Rust version to the CPython version.

Definition of done

Determine the feasibility of a full port.

Pitfalls

Users would need a rust toolchain to build our C extensions on unsupported platforms.