Clasp 0.4 -- Lisp Over LLVM -- Generates Code 200x Faster Written by Michael Larabel in LLVM on 23 November 2015 at 07:49 AM EST. 17 Comments Clasp is a Common Lisp compiler based on LLVM that also provides seamless interoperation with C++ libraries. Clasp 0.4 has been released with some big improvements. Clasp 0.4 reportedly is capable of generating "200x faster code than previously" while having