; * lisp/help-fns.el: Speed up `describe-mode'

; * lisp/help-fns.el: Speed up `describe-mode'

* lisp/help-fns.el (help-fns--list-local-commands): Speed up (bug#49579).

A predicate checks if there are no key bindings for a given function. A
full list of bindings is not needed, even a single binding is sufficient
to say the function is bound. Set FIRSTONLY arg in where-is-internal so
this predicate runs faster, with functional equivalence. For some
configurations this has a noticeable improvement on the speed of
describe-mode.

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