Gambit is a fantastic scheme system. The performance you get from it exceeds even SBCL in my limited use cases. Additionally, Gerbil Scheme (http://cons.io http

Gambit is a fantastic scheme system. The performance you get from it exceeds even SBCL in my limited use cases. Additionally, Gerbil Scheme (http://cons.io http://cons.io), built on Gambit, has expanded syntax like racket's #lang features for dsls. Several packages have also been create for it for most of the things I need.