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-rw-r--r--lisp/font-lock.el10
1 files changed, 7 insertions, 3 deletions
diff --git a/lisp/font-lock.el b/lisp/font-lock.el
index 38ea3aa029d..21e25ac8a54 100644
--- a/lisp/font-lock.el
+++ b/lisp/font-lock.el
@@ -846,9 +846,13 @@ happens, so the major mode can be corrected."
(defcustom font-lock-support-mode 'jit-lock-mode
"*Support mode for Font Lock mode.
Support modes speed up Font Lock mode by being choosy about when fontification
-occurs. Known support modes are Fast Lock mode (symbol `fast-lock-mode'),
-Lazy Lock mode (symbol `lazy-lock-mode'), and Just-in-time Lock mode (symbol
-`jit-lock-mode'. See those modes for more info.
+occurs. The default support mode, Just-in-time Lock mode (symbol
+`jit-lock-mode'), is recommended.
+
+Other, older support modes are Fast Lock mode (symbol `fast-lock-mode') and
+Lazy Lock mode (symbol `lazy-lock-mode'). See those modes for more info.
+However, they are no longer recommended, as Just-in-time Lock mode is better.
+
If nil, means support for Font Lock mode is never performed.
If a symbol, use that support mode.
If a list, each element should be of the form (MAJOR-MODE . SUPPORT-MODE),