Lag, (probably not related with known matchparen issue

[945fc41467]

Description

Using basic motion key lag on certain specific places when vimtex is activated

For example ([ ] representing the position of the cursor) :

  \begin{Defin[i]tion}[Produit matriciel :]
    Soient $A,[ ]B \in M_{m;l}(\R)×M_{l;n}(\R)$, $A \cdot B = 
    \left(\sum_{k=1}^{l}{a_{i;k}\cdot b_{k;j}}\right)_{
      {i\in\llbracket 1; m \rrbracket}\atop
      {j\in\llbracket 1; n \rrbracket}}$
  \end{Definition}

the switch between [ ] and [i] is ok, but it lag in the reverse order.

You can reproduce it with your minimal example :

\documentclass{minimal}
\begin{document}
Hello world!
\end{document}

Just try to navigate in the text with hjkl keys.

I tried with let g:vimtex_matchparen_enabled = 0. It doesn’t change anything. I added let loaded_matchparen = 1. Still the same.
The use of vim-matchup doesn’t change anything. There is no lag if vimtex is disabled.

I use nvim, with neovide.

Here is my config:

" VIM Configuration

" --Thème
let &colorcolumn=join(range(81,160),",")

" -- Affichage
set title           " Met a jour le titre de votre fenêtre ou de votre terminal
set number          " Affiche le numéro des lignes
set textwidth=80    " Affiche les lignes trop longues sur plusieurs lignes
set linebreak       " Coupe le mot entier
set scrolloff=3     " Minimum de 3 lignes autour du curseur lors du scroll
set lines=80 columns=100
set cursorline

" -- Recherche
set ignorecase      " Ignore la casse lors d'une recherche…
set smartcase       " …sauf si la recherche contient une majuscule 

" -- Clipboard

set clipboard+=unnamedplus

" -- Beep
"set visualbell            " Empêche Vim de beeper
"set noerrorbells          " Empêche Vim de beeper

" Active le comportement 'habituel' de la touche retour en arrière
let mapleader = ","

" --Coloration syntaxique
filetype plugin on
filetype indent on
set listchars=tab:▸-,extends:>,precedes:<,leadmultispace:·,nbsp:~
autocmd BufRead,BufNewFile *.txt,*.md setlocal listchars+=multispace:·
set list
"autocmd BufRead,BufNewFile *.txt,*.md highlight NBSP guibg=darkblue
autocmd BufRead,BufNewFile *.txt,*.md syn match NBSP '\%xa0' conceal cchar=~
autocmd BufRead,BufNewFile *.txt,*.md syn match NNBSP '\%u202F' conceal cchar=·
" -- Typo
autocmd BufRead,BufNewFile *.txt,*.md highlight typo guibg=darkred
autocmd BufRead,BufNewFile *.txt,*.md syn match typo /\%u202F:/
autocmd BufRead,BufNewFile *.txt,*.md syn match typo /\%xa0[;?!]/
autocmd BufRead,BufNewFile *.txt,*.md syn match typo /—\%xa0.*\%xa0—/


"highlight ColorColumn guibg=#010101
highlight NbSp ctermbg=white guibg=green
match NbSp /\%xa0/


" --Tabulations
set tabstop=2 " Largeur de tabulation
set shiftwidth=2
set expandtab " Remplacer les tabulation par des espaces


:imap ’’ <Esc>
:map ’’ <Esc>


set foldmethod=indent
set foldlevelstart=99
set foldlevel=99
set autochdir
set signcolumn=yes

" -- Autocompletion
" Use <tab> to trigger completion.
inoremap <silent><expr> <tab> coc#refresh()

" Make <space> to accept selected completion item or notify coc.nvim to format
" <C-g>u breaks current undo, please make your own choice
inoremap <silent><expr> <C-space>
      \ coc#pum#visible() ? coc#pum#confirm():
      \                     "\<C-g>u\<C-space>"

" Use <C-t> for trigger completion with characters ahead and navigate
inoremap <silent><expr> <C-t>
      \ coc#pum#visible() ? coc#pum#next(1) :
      \                     CheckBackspace() ? "\<C-t>" :
      \                                        coc#refresh()
inoremap <expr><C-s> coc#pum#visible() ? coc#pum#prev(1) : "\<C-s>"

function! CheckBackspace() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Remap keys for applying refactor code actions
nmap <silent> <leader>re <Plug>(coc-codeaction-refactor)
xmap <silent> <leader>r  <Plug>(coc-codeaction-refactor-selected)
nmap <silent> <leader>r  <Plug>(coc-codeaction-refactor-selected)

" Use <TAB> to trigger orthograph corrector
nmap <TAB>  <Plug>(coc-codeaction-cursor)

"hi LanguageToolGrammarError  guisp=green gui=undercurl guifg=NONE guibg=NONE ctermfg=white ctermbg=blue term=underline cterm=none
"hi GrammalecteSpellingError guisp=red  gui=undercurl guifg=NONE guibg=NONE ctermfg=white ctermbg=red  term=underline cterm=none
":let g:grammalecte_win_height=-1
"set spl=fr spell

" -- Latex configuration
" Viewer options: One may configure the viewer either by specifying a built-in
" with a generic interface:
"let g:vimtex_view_general_viewer = 'evince'
"let g:vimtex_view_general_options = '--unique file:@pdf\#src:@line@tex'
let loaded_matchparen = 1
let g:vimtex_matchparen_enabled = 0
let g:matchup_override_vimtex = 1
let g:matchup_matchparen_deferred = 1

" -- csv configuration
let g:csv_bind_B = 1
let g:csv_start = 1
let g:csv_end = 100
let g:csv_arrange_align = 'l*'

call plug#begin('~/.local/share/nvim/site/plugged')
Plug 'rakr/vim-one'
Plug 'altercation/solarized'
Plug 'vim-airline/vim-airline'
Plug 'neovim/neovim-ruby'
"Plug 'vim-scripts/LustyExplorer'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'chrisbra/csv.vim'
Plug 'lervag/vimtex'
Plug 'andymass/vim-matchup'
Plug 'michamos/vim-bepo'
call plug#end()


colorscheme one

Steps to reproduce

No response

Expected behavior

No response

Actual behavior

No response

Do you use a latexmkrc file?

For the moment I use default configuration. I am still trying to learn how it works

VimtexInfo

System info:
  OS: Manjaro Linux
  Vim version: NVIM v0.9.5
  Has clientserver: true
  Servername: /run/user/1000/nvim.79898.0

VimTeX project: example
  base: example.tex
  root: ~/
  tex: ~/example.tex
  main parser: current file verified
  document class: extarticle
  packages: authoraftertitle derivative enumitem fancyhdr fontspec geometry linegoal mathtools multicol ntheorem paracol polyglossia siunitx stmaryrd titlesec unicode-math xcolor xltabular
  compiler: latexmk
    engine: -pdf
    options:
      -verbose
      -file-line-error
      -synctex=1
      -interaction=nonstopmode
    callback: 1
    continuous: 1
    executable: latexmk
  viewer: General
  qf method: LaTeX logfile

[lervag]

Using basic motion key lag on certain specific places when vimtex is activated …

You can reproduce it with your minimal example : …

I'm sorry if I'm daft, but the minimal example here that you claim should reproduce this is:

\documentclass{minimal}
\begin{document}
Hello world!

\begin{Definition}[Produit matriciel :]
  Soient $A,█B \in M_{m;l}(\R)×M_{l;n}(\R)$, $A \cdot B = 
  \left(\sum_{k=1}^{l}{a_{i;k}\cdot b_{k;j}}\right)_{
    {i\in\llbracket 1; m \rrbracket}\atop
    {j\in\llbracket 1; n \rrbracket}}$
\end{Definition}

\end{document}

where █ indicates the initial cursor position. You are saying that moving the cursor with k is ok, but moving it back down with j is laggy. Did I understand correctly?

[lervag]

For the record: I can not reproduce this lag on my end.

[945fc41467]

That’s right. I tried with you example and I have the same behavior. I didn’t identify the logic in which move is laggy or not. It look rather random. But the navigation is very difficult like this.

[lervag]

Ok. So, the main approahc for helping you with this is to have you create a minimal configuration that reproduces this. But before we start doing that, can you do this:

1. Open the example LaTeX file provided above with neovim as you usually do.
2. Report output of :scriptnames (I would prefer if you could paste the output verbatim in your reply instead of using a screenshot).
3. :profile start profile.log
4. :profile func *
5. :profile file *
6. Navigate for a while, make sure you experience the lag.
7. :profile pause
8. :qa!
9. Please provide the contents of profile.log here.

I may be able to figure out your problem from this output.