I am unfamiliar with this project and only skimmed this post but if this uses Rust for the main binary blob it should be possible to have the main thread blob shared with the other threads even with the blocking.

The blog post cites the concern that malloc could block, however when Rust's standard library is compiled with support for atomics enabled the Rust allocator's locking implementation busy loops instead of waiting on the main thread.

See the comment in the Rust source here: https://github.com/rust-lang/rust/blob/77a4fb62f70c6ea05e182...

This means that if care is taken to avoid any other code that makes the main thread wait it should be possible to use a single shared binary instead of the more convoluted approach presented in the blog post.