If you're looking for a REPL, there's [inim](https://github.com/inim-repl/INim) which is pretty adequate. It's not the same sort of REPL as you'd expect with a LISP lang where you can do everything in it, but it's more like the Python or Node.js REPL where you can write statements and evaluate them, keeping all of the previous code you wrote in the session active. I used it quite a bit when I was a novice in the language and needed to try things out to see how they worked. Every once in a while I still use it to test a self-contained proc or something.
It's relatively fast, using [tcc](https://en.wikipedia.org/wiki/Tiny_C_Compiler) under the hood for compilation, but it's not going to be anywhere near as fast as an interpreted or partially interpreted language. Its performance is similar or slightly worse than Java's JShell REPL, but slightly more pleasant given the fact that is has colors and the cursor doesn't glitch around as much.
