I would like to apply either the first three or all four of the attached
* The first two are mostly cosmetic.
* The third patch avoids unnecessary special bindings of
*HANDLER-CLUSTERS* in SIGNAL.
* The fourth patch changes %HANDLER-BIND/SIGNAL to use
dynamic-extent functions for condition type tests, thereby
avoiding type specifier parsing at runtime and enabling TYPEP
I think the first three patches should be rather uncontroversial. The
fourth patch accounts for most of the speedup but increases code size.
What do you think?