From: Gerald Wildgruber <wildgruber@tu-berlin.de>
To: Eli Zaretskii <eliz@gnu.org>
Cc: acm@muc.de, emacs-devel@gnu.org
Subject: Re: follow-mode: extremely slow in combination with org-mode
Date: Tue, 19 Jun 2018 15:53:55 +0200 [thread overview]
Message-ID: <87efh2naq4.fsf@tu-berlin.de> (raw)
In-Reply-To: <83d0wptpmu.fsf@gnu.org>
Hi
I tried the patched follow.el (the one that contains the modified
follow-calc-win-end) on my somewhat slower (but also new quad core)
office machine, unfortunately no amelioration of lag was noticeable.
Same procedure: patching follow.el, starting the profiler, loading the
patched uncompiled version into emacs via M-x load-file and finally
start editing.
The lag remains enormous (e.g. more than a second lag between typing RET
and seeing a newline on screen); I noticed however, that upon typing RET
one time, the newline comes almost immediately; but after typing more
RETs they take ages to appear on screen.
Bizarrely, this happened also: redisplay takes very long and it
apparently aborts leaving paragraphs before point unfilled, one long
line of text (I always use auto-fill-mode).
On So, Jun 17 2018, Eli Zaretskii <eliz@gnu.org> wrote:
> Each character you insert triggers redisplay, and I'm guessing
> follow-mode has many of the redisplay optimizations disabled.
Actually, I had no idea. I tried to understand what "redisplay" is (by
reading the comments at the beginning of emacs/src/xdisp.c) and the more
I read, the less I am surprised it takes so long! :-)
Why might those optimizations have been disabled on follow-mode?
> But it may be interesting to see a profile when all you do is type
> self-inserting characters, maybe we will learn something important
> from that.
Here is another profile, now on my office machine with only
self-inserting commands, i.e. typing just "normal" letters:
- follow-post-command-hook 54982 61%
- if 54982 61%
- let 54975 61%
- save-current-buffer 54975 61%
- follow-adjust-window 54975 61%
- if 54972 61%
- progn 54972 61%
- let 53646 59%
- let* 53646 59%
- if 53646 59%
- follow-redisplay 49062 54%
- let* 49062 54%
- cond 43568 48%
- follow-calculate-first-window-start-from-above 43568 48%
- save-excursion 43568 48%
- let 43568 48%
- while 43564 48%
- if 43564 48%
- setq 42813 47%
- follow-calc-win-start 42813 47%
- while 42813 47%
- let 42802 47%
- setq 42789 47%
- car 42789 47%
- follow-calc-win-end 42785 47%
- let 42785 47%
- save-current-buffer 42785 47%
- unwind-protect 42785 47%
- progn 42777 47%
- let* 42767 47%
+ setq 10 0%
+ window-end 4 0%
+ and 7 0%
+ not 747 0%
if 4 0%
+ follow-calc-win-start 3062 3%
+ follow-estimate-first-window-start 1410 1%
+ let 1022 1%
- let 4574 5%
- redisplay 4570 5%
- redisplay_internal (C function) 17 0%
- eval 11 0%
if 8 0%
mode-line-eol-desc 3 0%
+ follow-avoid-tail-recenter 7 0%
if 3 0%
+ follow-windows-start-end 1326 1%
+ progn 3 0%
+ follow-post-command-hook 3 0%
+ command-execute 27012 30%
Anything else to try to get a faster follow-mode?
Thanks
Gerald.
---------------------
Sent with mu4e
next prev parent reply other threads:[~2018-06-19 13:53 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-16 10:25 follow-mode: extremely slow in combination with org-mode Gerald Wildgruber
2018-06-16 11:41 ` Eli Zaretskii
2018-06-16 13:06 ` Gerald Wildgruber
2018-06-16 16:25 ` Eli Zaretskii
2018-06-16 21:05 ` Gerald Wildgruber
2018-06-17 6:57 ` Gerald Wildgruber
2018-06-17 8:12 ` Eli Zaretskii
2018-06-17 11:13 ` Alan Mackenzie
2018-06-17 13:02 ` Eli Zaretskii
2018-06-17 14:56 ` Gerald Wildgruber
2018-06-17 15:10 ` Eli Zaretskii
2018-06-19 12:08 ` Gerald Wildgruber
2018-06-19 16:55 ` Eli Zaretskii
2018-06-19 13:53 ` Gerald Wildgruber [this message]
2018-06-17 15:13 ` Eli Zaretskii
2018-06-21 8:25 ` Anders Lindgren
2018-06-27 16:43 ` Gerald Wildgruber
2018-07-09 20:12 ` Anders Lindgren
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