+ * enhancement: errors during compiler-macro expansion no longer cause
+ runtime errors, only a compile-time warning, otherwise behaving as if
+ the compiler macro had declined to expand.
+ * optimization: On x86-64, code alignment of block headers is done with
+ multi-byte NOPs now instead of repetitions of the single-byte NOP.
+ * optimization: MAP-INTO is substantially faster when the target sequence is
+ of unknown type; mapping into lists is no longer O(N^2). (thanks to James
+ M. Lawrence)
+ * optimization: the compiler no longer heap-conses to check exits in cases
+ where the exit function is dynamic extent, or when it can prove the exit
+ function cannot escape.
+ * optimization: SB-SEQUENCE:DOSEQUENCE is faster on vectors of unknown
+ element type, and vectors that aren't SIMPLE-ARRAYs.
+ * optimization: CL:SORT and CL:STABLE-SORT are more efficient in execution
+ speed (around 1/3 the time in some cases), and a little better in terms of
+ comparison calls. (Thanks to Takeru Ohta)
+ * bug fix: On SPARC, a limitation on the number of code constants emittable
+ by the compiler has been lifted, allowing certain long functions to
+ compiled and assembled which had previously been unsupported; fixes
+ cl-bench on this ISA (lp#1008996).