4 ms·

I don't understand. Do you mean that you can't compile Clojure into Common Lisp the way you can compile it into Python/PyPy?

• halgari 15y ago
  You can, but I think you'd run into the same issues mentioned here: http://clojure-py.blogspot.com/2012/02/ive-been-asked-many-times-recently-how.html http://clojure-py.blogspot.com/2012/02/ive-been-asked-many-t... Basically it reflection (aka dynamic dispatch) is a major performance killer if you don't implement a tracing jit.
  • pavelludiq 15y ago
    Wouldn't SBCLs type inference(+ type hints) help with this? I'm no compiler expert, but i think clojure(with the possible exception of multimethods, which are slow even on the JVM) would map well to CL(maybe even better than the JVM).
  • mbenkard 15y ago
    CLOS implementations have had to deal with the problem of extreme dynamism for a long time, so there has been quite a bit of optimization work associated with it. Polymorphic inline caches help a lot, for example. That said, a good tracing JIT is probably better; but on the other hand, SBCL has profited from many years of optimization work on CMU CL. It would be interesting to see some real-world performance comparisons between SBCL and PyPy.
• nickik 15y ago
  PyPy is not just an Python-Interpreter. The PyPy Team build a Toolchain that can creat a JIT-Compiler out of a Interpreter (read some about the pypy project and you will be enlightened. Such a Toolchain does not exist for Common Lisp.
  • mbenkard 15y ago
    Interesting! Thanks for the pointer.