The final code in the "Squeezing performance 2" section looks scary. I'll admit I'm not an expert in CL and have only written Clojure, but that does not look li

The final code in the "Squeezing performance 2" section looks scary. I'll admit I'm not an expert in CL and have only written Clojure, but that does not look like idiomatic CL. A good comparison would be idiomatic C++ vs. idiomatic CL. If this is idiomatic CL, then i'm really surprised at the performance.