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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: bug-reference-prog-mode slows down CC Mode's scrolling by ~7%
Date: Wed, 01 Sep 2021 16:59:02 -0400	[thread overview]
Message-ID: <jwvy28gyq7r.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <YS+5UgZ+sXleM5nK@ACM> (Alan Mackenzie's message of "Wed, 1 Sep 2021 17:33:06 +0000")

> However, this mechanism is rendered ineffective if a second function is
> add-hook'd onto jit-lock-functions.  Maybe this could be fixed, though
> it looks difficult.

I think we can "easily" handle this specific case if the
`bug-reference-prog-mode` function is added to the end of the hook
rather than to its beginning and use a patch along the lines of the
one below.

I don't know if it would make any difference to the 7% figure.


        Stefan


diff --git a/lisp/jit-lock.el b/lisp/jit-lock.el
index a905936b6b9..14d09c979b9 100644
--- a/lisp/jit-lock.el
+++ b/lisp/jit-lock.el
@@ -390,7 +390,7 @@ jit-lock--run-functions
      'jit-lock-functions
      (lambda (fun)
        (pcase-let*
-           ((res (funcall fun beg end))
+           ((res (funcall fun (or tight-beg beg) (tight-end end)))
             (`(,this-beg . ,this-end)
              (if (eq (car-safe res) 'jit-lock-bounds)
                  (cdr res) (cons beg end))))




  parent reply	other threads:[~2021-09-01 20:59 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-01 17:33 bug-reference-prog-mode slows down CC Mode's scrolling by ~7% Alan Mackenzie
2021-09-01 17:44 ` Eli Zaretskii
2021-09-01 17:55   ` Alan Mackenzie
2021-09-01 18:01     ` Eli Zaretskii
2021-09-01 18:20       ` Alan Mackenzie
2021-09-01 18:28         ` Eli Zaretskii
2021-09-01 19:19           ` Alan Mackenzie
2021-09-01 20:59 ` Stefan Monnier [this message]
2021-09-02  6:26   ` Eli Zaretskii
2021-09-02 16:57   ` Alan Mackenzie
2021-09-02 18:46     ` Stefan Monnier
2021-09-02 19:24       ` Alan Mackenzie
2021-09-02 21:08         ` Alan Mackenzie
2021-09-03  6:16           ` Eli Zaretskii
2021-09-03 12:30             ` Stefan Monnier
2021-09-03 12:38               ` Eli Zaretskii
2021-09-03 22:25                 ` Stefan Monnier
2021-09-04  6:13                   ` Eli Zaretskii
2021-09-04 13:36                     ` Stefan Monnier
2021-09-04 13:55                       ` Eli Zaretskii
2021-09-04 14:44                         ` Stefan Monnier
2021-09-04 14:56                           ` Eli Zaretskii
2021-09-04 15:55                             ` Stefan Monnier
2021-09-04 16:12                               ` Eli Zaretskii
2021-09-04 16:24                                 ` Stefan Monnier
2021-09-04 16:28                                   ` Eli Zaretskii
2021-09-04 16:40                                     ` Stefan Monnier
2021-09-03  6:10         ` Eli Zaretskii
2021-09-03 10:47           ` Alan Mackenzie
2021-09-03 11:24             ` Eli Zaretskii
2021-09-03 16:15               ` Alan Mackenzie
2021-09-03 12:27             ` Stefan Monnier
2021-09-03 12:19           ` Stefan Monnier
2021-09-03 12:35             ` Eli Zaretskii
2021-09-03 16:52           ` Alan Mackenzie
2021-09-03 20:51             ` Alan Mackenzie
2021-09-04  6:09               ` Eli Zaretskii
2021-09-04 14:50                 ` Alan Mackenzie
2021-09-04 15:00                   ` Stefan Monnier
2021-09-04 15:32                     ` Alan Mackenzie
2021-09-04 15:36                       ` Eli Zaretskii
2021-09-04 15:43                         ` Alan Mackenzie
2021-09-04 15:48                           ` Eli Zaretskii
2021-09-04 16:05                             ` Alan Mackenzie
2021-09-04 16:15                               ` Eli Zaretskii
2021-09-06 10:46                                 ` Alan Mackenzie
2021-09-06 11:10                                   ` Eli Zaretskii
2021-09-06 19:08                                     ` Alan Mackenzie
2021-09-06 19:23                                       ` Eli Zaretskii
2021-09-18 11:37                                         ` Alan Mackenzie
2021-09-18 11:59                                           ` Eli Zaretskii
2021-09-06 21:59                                       ` andrés ramírez
2021-09-07 19:47                                         ` Alan Mackenzie
2021-09-07 17:57                                           ` andrés ramírez
2021-09-06 13:24                                   ` Stefan Monnier
2021-09-04 16:06                       ` Stefan Monnier
2021-09-04 16:23                         ` Eli Zaretskii
2021-09-04 16:39                           ` Stefan Monnier
2021-09-04 17:19                             ` Eli Zaretskii
2021-09-04 17:47                               ` Stefan Monnier
2021-09-04 18:10                                 ` Eli Zaretskii
2021-09-04 18:40                                   ` Stefan Monnier
2021-09-11 12:49                                     ` Eli Zaretskii
2021-09-11 17:04                                       ` Stefan Monnier
2021-09-11 17:17                                         ` Eli Zaretskii
2021-09-11 18:00                                           ` Stefan Monnier
2021-09-11 18:16                                             ` Eli Zaretskii
2021-09-11 19:55                                               ` Stefan Monnier
2021-09-12  3:51                                                 ` Eli Zaretskii
2021-09-12 16:41                                                   ` Stefan Monnier
2021-09-12 16:53                                                     ` Eli Zaretskii
2021-09-12 17:41                                                       ` Stefan Monnier
2021-09-12 17:55                                                         ` Eli Zaretskii
2021-09-12 21:11                                                           ` Stefan Monnier

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