Variable: comment-combine-change-calls
comment-combine-change-calls is a buffer-local variable defined in
newcomment.el.gz.
Documentation
If non-nil (the default), use combine-change-calls around
calls of comment-region-function and
uncomment-region-function. This Substitutes a single call to
each of the hooks before-change-functions and
after-change-functions in place of those hooks being called
for each individual buffer change.
Source Code
;; Defined in /usr/src/emacs/lisp/newcomment.el.gz
(defvar-local comment-combine-change-calls t
"If non-nil (the default), use `combine-change-calls' around
calls of `comment-region-function' and
`uncomment-region-function'. This Substitutes a single call to
each of the hooks `before-change-functions' and
`after-change-functions' in place of those hooks being called
for each individual buffer change.")