Variable: imenu-use-markers
imenu-use-markers is a customizable variable defined in imenu.el.gz.
Value
t
Documentation
Non-nil means use markers instead of integers for Imenu buffer positions.
Setting this to nil makes Imenu work a little faster but editing the buffer will make the generated index positions wrong.
This might not yet be honored by all index-building functions.
Source Code
;; Defined in /usr/src/emacs/lisp/imenu.el.gz
(defcustom imenu-use-markers t
"Non-nil means use markers instead of integers for Imenu buffer positions.
Setting this to nil makes Imenu work a little faster but editing the
buffer will make the generated index positions wrong.
This might not yet be honored by all index-building functions."
:type 'boolean)