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That’s one of its strengths though . A lisp with type inference and performance is quite rare. More lisps should be less lispy .

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> A lisp with type inference and performance is quite rare.

You mean apart from several Scheme implementations?

Chez Scheme is blisteringly fast, and on-par with C for quite a few things.

Gambit-C (Compiles to C), Chicken (based on the Cheney-on-the-MTA model) and Bigloo (designed to replace C++) also deserve a reference here.

Bigloo has a special place in my heart. I spent a few years building scheme bindings to various C graphics and networking libraries. I can't quite put my finger on it, but I found it very enjoyable. Getting C-like performance from scheme is just wonderful.

Racket which is moving to a Chez Scheme top and you can further go with typed Racket seems to fit that 'rare' category.

> A lisp with type inference and performance is quite rare.

That's quite a befuddling thing to say, in every aspect.

The popular SBCL is likely the fastest general Lisp out there (gets close to or equal to C when declared properly), and type inference is certainly part of those speed wins.

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