Re: Improving vim startuptime

On Sun, Jul 16, 2023 at 10:10:02PM +0200, Dominique Pellé wrote:
> In your startup file, I see:
>
> 374.858 001.193 001.193: sourcing
> /home/neon/.vim/plugged/vim-gutentags/autoload/gutentags.vim
> 377.927 002.447 002.447: sourcing
> /home/neon/.vim/plugged/YouCompleteMe/autoload/youcompleteme.vim
> 610.942 000.370 000.370: sourcing
> /home/neon/.vim/plugged/context.vim/autoload/context/line.vim
> 611.846 234.541: VimEnter autocommands
> 611.854 000.008: before starting main loop
>
> I don't understand how this works.
> Isn't it youcompleteme.vim which is slow? since the timestamp
> goes from 377.927ms to 610.942 ms.
Actually that confused me too. I reckon second column is the elapsed
time for that event. Maybe things are being initialized in parallel?

> In the original post, you said that startup took 2.6 sec but we see
> it's much faster than that from vim --startup.
>
> In my set up, youcompleteme.vim also seems to be the slowest step.
> But it's faster than for you.
I have a check in my youcompleteme configuration which helps me in
loading either ycm or coc.nvim for different filetypes.

```
let g:ycm_filetype_blacklist = {'rust': 1, 'erlang': 1, 'haskell': 1, \
'tablegen': 1, 'mlir': 1, 'svelte': 1, 'typescript':1}
```

Removing this check gives me a 38ms improvement (from 238ms to 200ms)
which is relatively a good amount.

But still yours is at 64ms and mine at 200ms. And IIRC I might have
built my ycm with all completers enabled. That may be the cause for it.

Rest of my ycm conf is straight taken up from their README page.

> Did you build with -O2? Consider posting the output of
> the `vim --version` command.
>
Here is my `vim --version`.


VIM - Vi IMproved 9.0 (2022 Jun 28, compiled May 04 2023 08:18:27)
Included patches: 1-1506
Compiled by Arch Linux
Huge version with GTK3 GUI. Features included (+) or not (-):
+acl +file_in_path +mouse_urxvt -tag_any_white
+arabic +find_in_path +mouse_xterm +tcl/dyn
+autocmd +float +multi_byte +termguicolors
+autochdir +folding +multi_lang +terminal
-autoservername -footer -mzscheme +terminfo
+balloon_eval +fork() +netbeans_intg +termresponse
+balloon_eval_term +gettext +num64 +textobjects
+browse -hangul_input +packages +textprop
++builtin_terms +iconv +path_extra +timers
+byte_offset +insert_expand +perl/dyn +title
+channel +ipv6 +persistent_undo +toolbar
+cindent +job +popupwin +user_commands
+clientserver +jumplist +postscript +vartabs
+clipboard +keymap +printer +vertsplit
+cmdline_compl +lambda +profile +vim9script
+cmdline_hist +langmap -python +viminfo
+cmdline_info +libcall +python3/dyn +virtualedit
+comments +linebreak +quickfix +visual
+conceal +lispindent +reltime +visualextra
+cryptv +listcmds +rightleft +vreplace
+cscope +localmap +ruby/dyn +wildignore
+cursorbind +lua/dyn +scrollbind +wildmenu
+cursorshape +menu +signs +windows
+dialog_con_gui +mksession +smartindent +writebackup
+diff +modify_fname -sodium +X11
+digraphs +mouse +sound -xfontset
+dnd +mouseshape +spell +xim
-ebcdic +mouse_dec +startuptime -xpm
+emacs_tags +mouse_gpm +statusline +xsmp_interact
+eval -mouse_jsbterm -sun_workshop +xterm_clipboard
+ex_extra +mouse_netterm +syntax -xterm_save
+extra_search +mouse_sgr +tag_binary
-farsi -mouse_sysmouse -tag_old_static
system vimrc file: "/etc/vimrc"
user vimrc file: "$HOME/.vimrc"
2nd user vimrc file: "~/.vim/vimrc"
user exrc file: "$HOME/.exrc"
system gvimrc file: "/etc/gvimrc"
user gvimrc file: "$HOME/.gvimrc"
2nd user gvimrc file: "~/.vim/gvimrc"
defaults file: "$VIMRUNTIME/defaults.vim"
system menu file: "$VIMRUNTIME/menu.vim"
fall-back for $VIM: "/usr/share/vim"
Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK -I/usr/include/gtk-3.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/sysprof-4 -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/gio-unix-2.0 -I/usr/include/cloudproviders -I/usr/include/atk-1.0 -I/usr/include/at-spi2-atk/2.0 -I/usr/include/at-spi-2.0 -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -pthread -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions -Wformat -Werror=format-security -fstack-clash-protection -fcf-protection -g -ffile-prefix-map=/build/vim/src=/usr/src/debug/vim -flto=auto -D_REENTRANT -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: gcc -Wl,-E -Wl,-rpath,/usr/lib/perl5/5.36/core_perl/CORE -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -flto=auto -L/usr/local/lib -o vim -lgtk-3 -lgdk-3 -lz -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -latk-1.0 -lcairo-gobject -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lSM -lICE -lXt -lX11 -lXdmcp -lSM -lICE -lm -ltinfo -lelf -lcanberra -lacl -lattr -lgpm -Wl,-E -Wl,-rpath,/usr/lib/perl5/5.36/core_perl/CORE -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -flto=auto -fstack-protector-strong -L/usr/local/lib -L/usr/lib/perl5/5.36/core_perl/CORE -lperl -lpthread -ldl -lm -lcrypt -lutil -lc -L/usr/lib -ltclstub8.6 -ldl -lz -lpthread -lm

--
Manas

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