This was something nice about CL implementations like SBCL. When you needed fast you can fully type everything and unbox it effectivly, but it got out of your

This was something nice about CL implementations like SBCL. When you needed fast you can fully type everything and unbox it effectivly, but it got out of your way when you didn't. Something approximating best of both worlds. Of course the fast code started to look like c, but that's not such a bad thing if you could localize it.