-The compiler reportedly produces pretty good code for modern CPU
-architectures which have lots of registers, but its code for the X86
-is marred by many extra loads and stores to stack-based temporary
-variables. Because of this, and because of the extra levels of
-indirection in Common Lisp relative to C, the performance of SBCL
-isn't going to impress people who are impressed by small constant
-factors. However, even on the X86 it tends to be faster than byte
-interpreted languages (and can be a lot faster).
-