* bug#52761: 29.0.50; (--with-pgtk) poor point movement performance when global-flycheck-mode is called during start-up
@ 2021-12-23 19:51 Simon Pugnet
2022-01-06 14:56 ` Yuuki Harano
0 siblings, 1 reply; 4+ messages in thread
From: Simon Pugnet @ 2021-12-23 19:51 UTC (permalink / raw)
To: 52761
[-- Attachment #1: Type: text/plain, Size: 4680 bytes --]
I've noticed a strange performance issue with Emacs when built
--with-pgtk, but only when global-flycheck-mode is called during Emacs
start-up.
To reproduce, download and extract the following packages: -
- Flycheck: https://melpa.org/#/flycheck
- Dash.el (dependency): https://elpa.gnu.org/packages/dash.html
Assuming these are at ~/flycheck and ~/dash, perform the following
steps: -
1. Create ~/init.el as follows: -
#+begin_src emacs-lisp
(add-to-list 'load-path (expand-file-name "~/flycheck"))
(add-to-list 'load-path (expand-file-name "~/dash"))
(require 'flycheck)
(global-flycheck-mode)
#+end_src
2. Run Emacs, loading this init.el file: "emacs -Q -l ~/init.el"
Now, when I use C-n/C-p to move around any buffer, there is a very
short but noticeable delay between key-presses and the point actually
moving. It's quite easy to notice when compared to the same Emacs run
as just "emacs -Q".
This only happens when Emacs is built --with-pgtk (and other features
as below). If I remove --with-pgtk, this delay disappears. Also, if I
do not call global-flycheck-mode during initialisation and instead
call it manually at some later stage, the delay also does not appear.
It only seems to happen when the global-flycheck-mode call is done
during initialisation.
Please let me know if there is any more information I can provide.
All the best and thanks in advance for your help,
Simon
In GNU Emacs 29.0.50 (build 4, x86_64-pc-linux-gnu, GTK+ Version
3.24.31, cairo version 1.17.4)
of 2021-12-23 built on tikal
Repository revision: 2fa7feca336dd16c57ffef072e0f0da6fffe4c5f
Repository branch: master
Windowing system distributor 'System Description: Arch Linux
Configured using:
'configure --with-native-compilation --with-modules --with-json
--with-xinput2 --with-pgtk'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ
JPEG
JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY
INOTIFY
PDUMPER PGTK PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS WEBP XIM GTK3 ZLIB
Important settings:
value of $LC_CTYPE: en_GB.UTF-8
value of $LANG: en_GB.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
eldoc-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
Load-path shadows:
/usr/local/share/emacs/29.0.50/lisp/emacs-lisp/eieio-compat hides
/usr/local/share/emacs/29.0.50/lisp/obsolete/eieio-compat
Features:
(shadow sort mail-extr emacsbug message mailcap yank-media rmc puny
dired dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg
rfc6068 epg-config gnus-util text-property-search time-date seq gv
subr-x byte-opt bytecomp byte-compile cconv mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
cl-loaddefs
cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr
mail-utils
iso-transl tooltip eldoc paren electric uniquify ediff-hook vc-hooks
lisp-float-type elisp-mode mwheel term/pgtk-win pgtk-win
term/common-win
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode lisp-mode prog-mode register page tab-bar
menu-bar
rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet
lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite emoji-zwj
charscript
charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget keymap hashtable-print-readable backquote threads
dbusbind inotify dynamic-setting system-font-setting
font-render-setting
cairo move-toolbar gtk x-toolkit pgtk lcms2 multi-tty
make-network-process native-compile emacs)
Memory information:
((conses 16 56008 9769)
(symbols 48 5662 1)
(strings 32 16131 1632)
(string-bytes 1 536291)
(vectors 16 11510)
(vector-slots 8 261217 13969)
(floats 8 26 26)
(intervals 56 224 0)
(buffers 992 11))
[-- Attachment #2: attachment.sig --]
[-- Type: application/pgp-signature, Size: 877 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#52761: 29.0.50; (--with-pgtk) poor point movement performance when global-flycheck-mode is called during start-up
2021-12-23 19:51 bug#52761: 29.0.50; (--with-pgtk) poor point movement performance when global-flycheck-mode is called during start-up Simon Pugnet
@ 2022-01-06 14:56 ` Yuuki Harano
2022-01-06 15:11 ` Simon Pugnet
0 siblings, 1 reply; 4+ messages in thread
From: Yuuki Harano @ 2022-01-06 14:56 UTC (permalink / raw)
To: simon; +Cc: 52761
[-- Attachment #1: Type: Text/Plain, Size: 280 bytes --]
On Thu, 23 Dec 2021 19:51:09 +0000,
Simon Pugnet <simon@polaris64.net> wrote:
> I've noticed a strange performance issue with Emacs when built
> --with-pgtk, but only when global-flycheck-mode is called during Emacs
> start-up.
Please try the attached patch.
--
Yuuki Harano
[-- Attachment #2: keypress-delay.diff --]
[-- Type: Text/X-Patch, Size: 1856 bytes --]
diff --git a/src/xgselect.c b/src/xgselect.c
index 674c259db7..14a8c73541 100644
--- a/src/xgselect.c
+++ b/src/xgselect.c
@@ -96,10 +96,21 @@ xg_select (int fds_lim, fd_set *rfds, fd_set *wfds, fd_set *efds,
int n_gfds, retval = 0, our_fds = 0, max_fds = fds_lim - 1;
int i, nfds, tmo_in_millisec, must_free = 0;
bool need_to_dispatch;
+#ifdef HAVE_PGTK
+ bool already_has_events = false;
+#endif
context = g_main_context_default ();
acquire_select_lock (context);
+#ifdef HAVE_PGTK
+ {
+ int errno_back = errno;
+ already_has_events = g_main_context_pending (context);
+ errno = errno_back;
+ }
+#endif
+
if (rfds) all_rfds = *rfds;
else FD_ZERO (&all_rfds);
if (wfds) all_wfds = *wfds;
@@ -146,10 +157,41 @@ xg_select (int fds_lim, fd_set *rfds, fd_set *wfds, fd_set *efds,
tmop = &tmo;
}
+#ifndef HAVE_PGTK
fds_lim = max_fds + 1;
nfds = thread_select (pselect, fds_lim,
&all_rfds, have_wfds ? &all_wfds : NULL, efds,
tmop, sigmask);
+#else
+ /*
+ On PGTK, when you type a key, the key press event are received,
+ and one more key press event seems to be received internally.
+ The second event is not via a socket, so there are weird status:
+ - socket read buffer is empty
+ - a key press event is pending
+ In that case, we should not sleep, and dispatch the event immediately.
+ Bug#52761
+ */
+ if (!already_has_events)
+ {
+ fds_lim = max_fds + 1;
+ nfds = thread_select (pselect, fds_lim,
+ &all_rfds, have_wfds ? &all_wfds : NULL, efds,
+ tmop, sigmask);
+ }
+ else
+ {
+ /* Emulate return values */
+ nfds = 1;
+ FD_ZERO(&all_rfds);
+ if (have_wfds)
+ FD_ZERO(&all_wfds);
+ if (efds)
+ FD_ZERO(efds);
+ our_fds++;
+ }
+#endif
+
if (nfds < 0)
retval = nfds;
else if (nfds > 0)
^ permalink raw reply related [flat|nested] 4+ messages in thread
* bug#52761: 29.0.50; (--with-pgtk) poor point movement performance when global-flycheck-mode is called during start-up
2022-01-06 14:56 ` Yuuki Harano
@ 2022-01-06 15:11 ` Simon Pugnet
2022-01-07 15:01 ` Yuuki Harano
0 siblings, 1 reply; 4+ messages in thread
From: Simon Pugnet @ 2022-01-06 15:11 UTC (permalink / raw)
To: Yuuki Harano; +Cc: 52761
[-- Attachment #1: Type: text/plain, Size: 487 bytes --]
"Yuuki Harano" <masm+emacs@masm11.me> writes:
> On Thu, 23 Dec 2021 19:51:09 +0000,
> Simon Pugnet <simon@polaris64.net> wrote:
>> I've noticed a strange performance issue with Emacs when built
>> --with-pgtk, but only when global-flycheck-mode is called during
>> Emacs
>> start-up.
>
> Please try the attached patch.
That patch seems to resolve the problem for me! Thank you for looking
into this bug.
Kind regards,
--
Simon Pugnet
https://www.polaris64.net/
[-- Attachment #2: attachment.sig --]
[-- Type: application/pgp-signature, Size: 877 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#52761: 29.0.50; (--with-pgtk) poor point movement performance when global-flycheck-mode is called during start-up
2022-01-06 15:11 ` Simon Pugnet
@ 2022-01-07 15:01 ` Yuuki Harano
0 siblings, 0 replies; 4+ messages in thread
From: Yuuki Harano @ 2022-01-07 15:01 UTC (permalink / raw)
To: simon; +Cc: 52761-done
On Thu, 06 Jan 2022 15:11:33 +0000,
Simon Pugnet <simon@polaris64.net> wrote:
> That patch seems to resolve the problem for me! Thank you for looking
> into this bug.
Thanks for the confirmation.
I fixed on master, and I'm closing this issue.
--
Yuuki Harano
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-01-07 15:01 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-12-23 19:51 bug#52761: 29.0.50; (--with-pgtk) poor point movement performance when global-flycheck-mode is called during start-up Simon Pugnet
2022-01-06 14:56 ` Yuuki Harano
2022-01-06 15:11 ` Simon Pugnet
2022-01-07 15:01 ` Yuuki Harano
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).