Well, SBCL can just use sources just fine. On Guile not being fast enough, it got a JIT since version 3 and it can be pretty fast. It must be, you know, because

Well, SBCL can just use sources just fine. On Guile not being fast enough, it got a JIT since version 3 and it can be pretty fast. It must be, you know, because if not Guix would be even slower.