Add to this integration with an entire family of languages. Racket permits you to jump between different syntaxes. The closest thing that immediately comes to m

Add to this integration with an entire family of languages. Racket permits you to jump between different syntaxes. The closest thing that immediately comes to mind is writing inline C in Chicken or Gambit Scheme and that's far clunkier. Hy (embeds in python) also comes to mind but Python often seems rather slow.