When comparing CMUCL vs PicoLisp, the Slant community recommends PicoLisp for most people. In the question“What are the best Lisp dialects?” PicoLisp is ranked 9th while CMUCL is ranked 13th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Fast execution, faster compilation
CMUCL runs about as fast as SBCL, and they are both among the fastest Common Lisp implementations. CMUCL compiles faster than SBCL, cutting down on development, deployment, installation, and user testing turnaround time.
Pro Stand-alone executables
Pro Copyfree licensed (revised BSD license)
Most of CMUCL is in the public domain, with a few subsytems under permissive license.
Pro Integrated database and Prolog engine
Pro Fast code execution speed
One of the fastest code execution speeds compared to other Lisp dialects.
Pro Simplicity
Compared to other Lisp dialects, it's simple and doesn't have unnecessary features.
Pro Tacit
Code written in is short and easier to understand most of the time.
Pro Foreign function interface
The language has built-in FFI for C and also interfaces with java(via ersatz)
Cons
Con No Windows version
Con Lack of Floating point data type
The language does not have floating point numbers only scaled fix-point numbers. Scaling of numbers is more work than directly working with floats.