* NEWS (fontification): Mention that the new default for

jit-lock-stealth-time is now nil.

* jit-lock.el (jit-lock-stealth-time): Change default to nil.
Preserve 16 as default value for "seconds" when customizing.

diff --git a/etc/ChangeLog b/etc/ChangeLog
index d3b8009cb1777dd6de4e84472d592b5d3e7a968c..be8c9f8948db36406a73f503d97c84cf935a7906 100644 (file)
--- a/etc/ChangeLog
+++ b/etc/ChangeLog
@@ -1,3 +1,8 @@
+2007-03-04  David Kastrup  <dak@gnu.org>
+
+       * NEWS (fontification): Mention that the new default for
+       jit-lock-stealth-time is now nil.
+
 2007-03-01  Kim F. Storm  <storm@cua.dk>
 
        * ORDERS: Reformat text.

diff --git a/etc/NEWS b/etc/NEWS
index 763faf4fe9ca41d3d8d644332edcc1d0363309d5..b229630fe0a32124923ad1462a71fcca57fe4b1b 100644 (file)
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1055,10 +1055,16 @@ cperl-mode and make-mode support this.
 
 ---
 *** The default settings for JIT stealth lock parameters are changed.
-The default value for the user option jit-lock-stealth-time is now 16
-instead of 3, and the default value of jit-lock-stealth-nice is now
-0.5 instead of 0.125.  The new defaults should lower the CPU usage
-when Emacs is fontifying in the background.
+The default value for the user option jit-lock-stealth-time is now nil
+instead of 3.  This setting of jit-lock-stealth-time disables stealth
+fontification: on today's machines, it may be a bug in font lock
+patterns if fontification otherwise noticeably degrades interactivity.
+If you find movement in infrequently visited buffers sluggish (and the
+major mode maintainer has no better idea), customizing
+jit-lock-stealth-time to a non-nil value will let Emacs fontify
+buffers in the background when it considers the system to be idle.
+jit-lock-stealth-nice is now 0.5 instead of 0.125 which is supposed to
+cause less load than the old defaults.
 
 ---
 *** jit-lock can now be delayed with `jit-lock-defer-time'.

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 0f5c8671564ea5e5e9993f33d494beb1668fa1d6..df0dc1e82202aeb1400482a9c7e44373f4e71191 100644 (file)
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2007-03-04  David Kastrup  <dak@gnu.org>
+
+       * jit-lock.el (jit-lock-stealth-time): Change default to nil.
+       Preserve 16 as default value for "seconds" when customizing.
+
 2007-03-04  Carsten Dominik  <dominik@science.uva.nl>
 
        * textmodes/org.el (org-self-insert-command)

diff --git a/lisp/jit-lock.el b/lisp/jit-lock.el
index 958bb679832d4d68c714c75cab1c6fa4584252dd..0471edb789168422947ce1a40314c14290a29873 100644 (file)
--- a/lisp/jit-lock.el
+++ b/lisp/jit-lock.el
@@ -74,14 +74,14 @@ This variable controls both display-time and stealth fontification."
   :group 'jit-lock)
 
 
-(defcustom jit-lock-stealth-time 16
+(defcustom jit-lock-stealth-time nil
   "*Time in seconds to wait before beginning stealth fontification.
 Stealth fontification occurs if there is no input within this time.
 If nil, stealth fontification is never performed.
 
 The value of this variable is used when JIT Lock mode is turned on."
   :type '(choice (const :tag "never" nil)
-                (number :tag "seconds"))
+                (number :tag "seconds" :value 16))
   :group 'jit-lock)