To be clear: Rust doesn't have a JIT. But we've been doing a lot of work on incremental recompilation, which will fix this problem. (Or rather, we've been working on the precursor requirement, MIR.)
To be extra clear, a crate is the unit of compilation in Rust, so changing your code means that the whole crate it's in needs recompiled; your dependencies won't be. Or, if your project is split up into multiple crates, the other ones won't. Incremental recompilation will reduce this level of granularity such that the whole crate won't need to be recompiled.
To be extra clear, a crate is the unit of compilation in Rust, so changing your code means that the whole crate it's in needs recompiled; your dependencies won't be. Or, if your project is split up into multiple crates, the other ones won't. Incremental recompilation will reduce this level of granularity such that the whole crate won't need to be recompiled.