cyclone VS Kawa

Wow, thanks a lot! I hit a snag running cyclone's repl on a M1 Mac, but found the fix here: https://github.com/justinethier/cyclone/issues/464

When developing Cyclone Scheme I discovered the latest R7RS Scheme language specification requires that several procedures handle circular lists.

Cyclone Scheme transpiles to C and can run in the browser using WASM.

Over the years various solutions have been developed to meet this requirement such as trampolines, goto's, compiler optimizations, etc. One of the most unusual was proposed by Henry Baker in his paper CONS Should Not CONS Its Arguments, Part II: Cheney on the M.T.A. (PDF).

And its successor, Cyclone, began in 2014, and is actively developed.

Gambit, and consequently Gerbil, are not very mature and still need a bit more of a environment. Stklos could also be interesting, as well as Cyclone.

Kawa (like Clojure) runs on the JavaVM, but has a longer pedigree (from 1996), good compatibility with standard Scehemes (including R7RS), and has a stronger emphasis on performance: It has optional types and semi-decent type inferance so it is easy to write code as performant as Java. It also has fast startup, and is unopinonated on how you run and bundle applications: it generates pretty vanilla class files that interoperate with Java easily. See https://www.gnu.org/software/org and https://gitlab.com/kashell/Kawa

Kawa is quite relevant, and it seems that the project started in 1996. Still actively maintained.