[winter_blue]

How is Rust in terms of incremental compile time? Is incrementally recompiling on file in a large project quick? Hopefully link times aren't that bad.

One thing I like about the JVM is hot code reloading. Most of the time, changes inside a method/function takes effect immediately with hot code reloading.

[chiffaa]

Link times are the worst part but solveable with mold[1]/sold. Incremental compilations are usually an order of magnitude (or even two) faster than clean compiles but tbh that can still feel slow. Helped by using something like sccache[2] or even cranelift[3] when debugging. Still not as fast as having a hot-reloadable language but it gets you to a relatively pleasant speed still IME

[1] https://github.com/rui314/mold [2] https://github.com/mozilla/sccache [3] https://github.com/rust-lang/rustc_codegen_cranelift

[mmastrac]

I've never been successful in getting sccache to really speed up projects, but then again only release builds have _really_ been impossible for me, and that's only when I was working on Deno which was absolutely massive.

[chiffaa]

sccache sped up my clean compiles by 2x on some projects, but it's a very YMMV solution most of the time

[mmastrac]

We had issues with long compile times at deno. Release builds were brutal, debug builds were OK as long as they were incremental. It was likely one of the largest open-source rust applications, but we were still quite productive.

Most likely you'll have years before it's an issue and there are mitigations.