From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Zhang Haijun Newsgroups: gmane.emacs.bugs Subject: bug#35316: 26.2; Emacs lags in c++-mode buffer when editing with iedit-mode on Date: Sun, 19 May 2019 13:51:49 +0000 Message-ID: References: <20190516150457.GA639@ACM> <20190516161704.GA527@ACM> <871s0xop2o.fsf@gmail.com> <20190517100118.GB5011@ACM> <87lfz5c7b5.fsf@gmail.com>,<20190519114019.GA5262@ACM> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="_000_PS1PR06MB2759C33DF874809E6C9215EFA8050PS1PR06MB2759apcp_" Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="57680"; mail-complaints-to="usenet@blaine.gmane.org" Cc: "35316@debbugs.gnu.org" <35316@debbugs.gnu.org> To: Alan Mackenzie , Amos Bird Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun May 19 15:52:14 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: 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The author of iedit seems not too active(not everyday) on github. Here is t= he email on his account info of github: victorhge@gmail.com.

However, the gmail is blocked in china(the page shows that he is in china).= I don't known if he can read the mail.

Besides iedit, I tried with multiple-cursors(https://github.com/magnars/multiple-cursors.el= ) with the similar editing operation. It works well(no obvious lags).
=BB=F1=C8=A1 Outlook for Android
From: Alan Mackenzie <= acm@muc.de>
Sent: Sunday, May 19, 2019 7:40:19 PM
To: Amos Bird; Zhang Haijun
Cc: 35316@debbugs.gnu.org
Subject: Re: bug#35316: 26.2; Emacs lags in c++-mode buffer = when editing with iedit-mode on
 
Hello, Amos and Zhang.

First thing, apologies for the patch I sent you a few days ago.  It wa= s
based on a misunderstanding, and it is total garbage!

The misunderstanding was the assumption that
`inhibit-modification-hooks' would be nil on entry to
`iedit-update-occurrences-2', and that leaving it nil would allow the
`before-change-functions' and `after-change-functions' hooks to run
normally.

In actual fact `inhibit-modification-hooks' is t at that point, and
cannot successfully be bound to nil.  So, both `before-change-function= s'
and `after-change-functions' need to be called explicitly for successful processing.

So, please disregard that previous patch from me, and try out instead
the patch below.  In C++ Mode it is somewhat slower, since it = is
actually doing the change processing, but not unusably so.  Undo seems=
to be working a bit faster too, though it is often not instantaneous as
one would wish (see below).

On Sat, May 18, 2019 at 01:35:58 +0800, Amos Bird wrote:

> Hi Alan!

> > Are we still talking about C++ Mode

> Yeah it's c++ mode but it can also be reproduced with c mode.<= br> > The minute long frozen is caused mainly by the lsp-mode, howeveer
> it's still laggy after turning lsp off.

> > How big is your file?  Can you characterise it in any way?
> You can try emacs/src/xdisp.c . iediting all "make_fixnum",<= br> > turning them into "make_fixnum_why_undo_redo_is_so_slow", an= d
> undo.
> It's about 10-20 seconds freezing time here.

When I do this now (with the patch in place), undo works in two stages,
taking about 0.4s and 2.4s respectively on my machine.

> > It seems I have more work to do on this in any case.

As a matter of interest, could one of you please give me the name and
email address of the iedit-mode maintainer.  I haven't got a github account, and don't want to create one, so I don't think I can get in
touch with her/him that way.

> Looking forward to it!

OK, here goes!



--- iedit-lib.el.orig   2019-05-19 10:55:31.681959998 +0000 +++ iedit-lib.el        2019= -05-19 11:08:27.549988930 +0000
@@ -490,7 +490,9 @@
 
 (defun iedit-update-occurrences-2 (occurrence after beg end &opti= onal change)
   ""
-  (let ((inhibit-modification-hooks t)
+  (let (;; (inhibit-modification-hooks t)
+        ;; Note: `inhibit-modificat= ion-hook' will already be non-nil when this
+       ;; function is called.  Sett= ing it to nil here doesn't work.
         (offset (- beg (overlay-st= art occurrence)))
         (value (buffer-substring-n= o-properties beg end)))
     (save-excursion
@@ -501,6 +503,9 @@
            &nb= sp;       (ending (+ beginning (- end beg= ))))
            &nb= sp;  (when (not (eq another-occurrence occurrence))
            &nb= sp;    (goto-char beginning)
+           &nbs= p;   (run-hook-with-args 'before-change-functions
+           &nbs= p;            &= nbsp;          beginning
+           &nbs= p;            &= nbsp;          (+ beginnin= g change))
            &nb= sp;    (insert-and-inherit value)
            &nb= sp;    ;; todo: reconsider this change Quick fix for
            &nb= sp;    ;; multi-occur occur-edit-mode: multi-occur depend on=
@@ -517,13 +522,17 @@
         ;; deletion
         (dolist (another-occurrenc= e (remove occurrence iedit-occurrences-overlays))
           (let ((beginni= ng (+ (overlay-start another-occurrence) offset)))
+           (goto-cha= r beginning)
+           (run-hook= -with-args 'before-change-functions
+           &nbs= p;            &= nbsp;      beginning
+           &nbs= p;            &= nbsp;      (+ beginning change))
             (d= elete-region beginning (+ beginning change))
             (u= nless (eq beg end) ;; replacement
            &nb= sp;  (goto-char beginning)
            &nb= sp;  (insert-and-inherit value))
             (r= un-hook-with-args 'after-change-functions
            &nb= sp;            =         beginning
-            &n= bsp;            = ;       (+ beginning (- beg end))
+           &nbs= p;            &= nbsp;       (+ beginning (- end beg))
            &nb= sp;            =         change)))))))
 
 (defun iedit-next-occurrence ()


> regards,

> --
> Amos Bird
> amosbird@gmail.com

--
Alan Mackenzie (Nuremberg, Germany).
 --_000_PS1PR06MB2759C33DF874809E6C9215EFA8050PS1PR06MB2759apcp_--