Haskell is one of the few languages that can compile slower than rust. But they have a REPL GHCI that can be used to fairly quickly reload code changes.
I wish there were some efforts at dramatically different approaches like this because there’s all this work going into compilation but it’s unlikely to make the development cycle twice as fast in most cases.
I've started liking evcxr (https://github.com/google/evcxr) for REPL. It's a little slow compared to other REPLs, but still good enough to be usable after initial load.