* fixed arguably-a-bug: GC time proportional to number of threads in
system even when most of them are idle
* optimization: improved performance of BIT and SBIT on bit-vectors.
+ * .fasl file incompatibility: The fasl file version number has
+ been incremented because of changes associated with package locks.
changes in sbcl-0.8.12 relative to sbcl-0.8.11:
* minor incompatible change: the system no longer provides