[fiddlerwoaroof]

If you need performance and want to avoid the jvm, there are also lisps like Chez Scheme and various Common Lisp implementations (sbcl, in particular, can produce really well-tuned numerical code).

[hjek]

... which is why Racket-on-Chez[0] is a really exciting development.

[0]: https://blog.racket-lang.org/2018/01/racket-on-chez-status.h...

[igouy]

"Keep in mind that the original goal is not to have a faster Racket, but a better-implemented Racket with acceptable performance."