COMPUTE-DISCRIMINATING-FUNCTION does much less wasted work.
* enhancement: Explicit memory barrier operations are now available for use
by multithreaded code. See documentation for details.
+ * enhancement: Experimental support for threading on Linux/PPC.
changes in sbcl-1.0.41 relative to sbcl-1.0.40:
* optimization: validity of observed keyword initargs to MAKE-INSTANCE is