Commit 9724173b authored by Gerd Moellmann's avatar Gerd Moellmann
Browse files

(jit-lock-fontify-now): Don't bind

font-lock-beginning-of-syntax-function to nil.
parent dc81f8a2
2001-01-19 Gerd Moellmann <>
* jit-lock.el (jit-lock-fontify-now): Don't bind
font-lock-beginning-of-syntax-function to nil.
2001-01-19 Eli Zaretskii <>
* mail/emacsbug.el (report-emacs-bug): Report values of
......@@ -264,8 +264,15 @@ Defaults to the whole buffer. END can be out of bounds."
(unless start (setq start (point-min)))
(setq end (if end (min end (point-max)) (point-max)))
(let ((font-lock-beginning-of-syntax-function nil)
;; This did bind `font-lock-beginning-of-syntax-function' to
;; nil at some point, for an unknown reason. Don't do this; it
;; can make highlighting slow due to expensive calls to
;; `parse-partial-sexp' in function
;; `font-lock-fontify-syntactically-region'. Example: paging
;; from the end of a buffer to its start, can do repeated
;; `parse-partial-sexp' starting from `point-min', which can
;; take a long time in a large buffer.
(let (next)
;; Fontify chunks beginning at START. The end of a
;; chunk is either `end', or the start of a region
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