* bug#69444: 30.0.50; 5 seconds to save file
@ 2024-02-28 0:32 Deric Bytes
2024-02-28 12:03 ` Eli Zaretskii
0 siblings, 1 reply; 3+ messages in thread
From: Deric Bytes @ 2024-02-28 0:32 UTC (permalink / raw)
To: 69444
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Saving a small file in emacs -q seems to take 1 to 5 seconds.
I assume this because the 'Rapid Refresh' app I am using takes 1 to 5
seconds to notice
the file change when I change it with emacs but 0 seconds when changed with
another editor.
.
I have done a recent and fresh install of emacs to see if it fixed it but
had no luck.
# set up rapid refresh app
npx create-expo-app@latest -t tabs@50
cd my-app
npx expo start
w
http://localhost:8082/
emacs -q 'app/(tabs)/index.tsx'
;; added a letter to a welcome string.
M-x save-buffer
Expected result: the 'Fast Refresh' of expo should instantly update
the web page.
Actual result: a variable 1 to 6 second delay (repeating same process)
before update
Actual result with neovim: page save leads to instant update every time.
I tried disabling these with no effect on the time
(setq before-save-hook nil)
(setq after-save-hook nil)
(setq vc-handled-backends nil)
I profiled save-buffer and it was
'0 0% ...'
In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.37, cairo version 1.16.0) of 2023-05-13 built on no-control-x1c
Repository revision: 7791907c3852e6ec197352e1c3d3dd8487cc04f5
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12302000
System Description: Ubuntu 23.10
Configured using:
'configure --with-tree-sitter --with-mailutils --with-json
--with-xwidgets --with-modules --with-imagemagick
--prefix=/home/no-control/installs --bindir=/home/no-control/bin
--with-native-compilation=no --with-xft'
Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ IMAGEMAGICK
JPEG JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES
NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP X11 XDBE XIM XINPUT2 XPM XWIDGETS
GTK3 ZLIB
Important settings:
value of $LANG: en_GB.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Fundamental
Minor modes in effect:
tooltip-mode: t
global-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
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug message mailcap yank-media puny dired
dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068
epg-config gnus-util text-property-search mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils extra-functions
thingatpt help-fns radix-tree cl-print byte-opt gv bytecomp byte-compile
debug backtrace help-mode find-func profiler time-date subr-x
cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc paren electric
uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel
term/x-win x-win term/common-win x-dnd 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 nadvice seq simple cl-generic
indonesian philippine 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 abbrev obarray oclosure cl-preloaded button loaddefs
theme-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 xwidget-internal dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
cairo move-toolbar gtk x-toolkit xinput2 x multi-tty
make-network-process emacs)
Memory information:
((conses 16 55658 12506)
(symbols 48 6603 0)
(strings 32 18066 1619)
(string-bytes 1 523080)
(vectors 16 52241)
(vector-slots 8 1066424 14413)
(floats 8 38 50)
(intervals 56 663 0)
(buffers 984 18))
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^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#69444: 30.0.50; 5 seconds to save file
2024-02-28 0:32 bug#69444: 30.0.50; 5 seconds to save file Deric Bytes
@ 2024-02-28 12:03 ` Eli Zaretskii
[not found] ` <CAN1Bi_GrGH3uwacV8BUJeZMLLFKVK5EDyztcyrb+5uwhzxm_FQ@mail.gmail.com>
0 siblings, 1 reply; 3+ messages in thread
From: Eli Zaretskii @ 2024-02-28 12:03 UTC (permalink / raw)
To: Deric Bytes; +Cc: 69444
> From: Deric Bytes <dericbytes@gmail.com>
> Date: Wed, 28 Feb 2024 00:32:10 +0000
>
> Saving a small file in emacs -q seems to take 1 to 5 seconds.
I sincerely doubt that, see below. Especially if the file's contents
is plain ASCII, so doesn't need any encoding when saving it.
> I assume this because the 'Rapid Refresh' app I am using takes 1 to 5 seconds to notice
> the file change when I change it with emacs but 0 seconds when changed with another editor.
You will need to tell us how does Rapid Refresh detect such changes,
because I don't know that. I also don't know what do "other editors"
do when you save a modified file. I do know what Emacs does by
default: it renames the original file to the backup file name (so a
file FOO will be renamed to FOO~), and then writes a _new_ file under
the original-file name with the new contents. So from the filesystem
POV, what happens is that the original file is renamed to a different
name, and then a new file appears under the name of the original file.
The question is: how would Rapid Refresh detect such changes, and what
would be the time frame for that?
If "other editors" overwrite the original file with new contents, the
filesystem could have a very different view of what happens, and thus
the detection by Rapid Refresh could exhibit different timings.
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#69444: 30.0.50; 5 seconds to save file
[not found] ` <CAN1Bi_HoNqSnWb-uR-cKxLnE06Xsr7Cu3R3cRsSW67+aoXhXdg@mail.gmail.com>
@ 2024-02-28 15:49 ` Eli Zaretskii
0 siblings, 0 replies; 3+ messages in thread
From: Eli Zaretskii @ 2024-02-28 15:49 UTC (permalink / raw)
To: Deric Bytes; +Cc: 69444
tags 69444 notabug
close 69444
thanks
[Please use Reply All to reply, to keep the bug tracker on the CC list.]
> From: Deric Bytes <dericbytes@gmail.com>
> Date: Wed, 28 Feb 2024 14:37:16 +0000
>
> SOLVED: It works instantaneously turning of create-lockfiles
>
> (setq create-lockfiles nil)
So you need to investigate why deleting a lock file either slows down
Emacs or slows down the Rapid Refresh's recognition of the fact that
the file was updated.
In any case, this doesn't seem to be a bug in Emacs, so I'm closing
it.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2024-02-28 0:32 bug#69444: 30.0.50; 5 seconds to save file Deric Bytes
2024-02-28 12:03 ` Eli Zaretskii
[not found] ` <CAN1Bi_GrGH3uwacV8BUJeZMLLFKVK5EDyztcyrb+5uwhzxm_FQ@mail.gmail.com>
[not found] ` <CAN1Bi_HoNqSnWb-uR-cKxLnE06Xsr7Cu3R3cRsSW67+aoXhXdg@mail.gmail.com>
2024-02-28 15:49 ` Eli Zaretskii
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