+ * minor incompatible change: OPTIMIZE qualities
+ SB-C::STACK-ALLOCATE-DYNAMIC-EXTENT, SB-C::STACK-ALLOCATE-VECTOR,
+ and SB-C::STACK-ALLOCATE-VALUE-CELLS no longer exist. See documentation
+ and SB-EXT:*STACK-ALLOCATE-DYNAMIC-EXTENT* for details.
+ * documentation: some slot access efficiency guidelines have been
+ added to the user manual.
+ * optimization: ASSOC-IF, ASSOC-IF-NOT, MEMBER-IF, MEMBER-IF-NOT,
+ RASSOC, RASSOC-IF, and RASSOC-IF-NOT are now equally efficient
+ as ASSOC and MEMEBER.
+ * optimization: calls to ASSOC, MEMBER, and RASSOC can be transformed
+ to more efficient EQ-comparison versions more often.
+ * optimization: enhanced derivation of DOLIST iteration variable type
+ for constant lists.
+ * optimization: constant folding of simple (LIST ...) forms as DOLIST
+ arguments.
+ * optimization: runtime lookup of function definitions can be
+ elided in more cases, eg: (let ((x 'foo)) (funcall foo)).
+ * optimization: compiler is able to derive the return type of
+ (AREF (THE STRING X) Y) as being CHARACTER.