Moving on long line is slow when set history

[mr-superonion]

Description

If I use set history=20 (or any other numbers) in my init.vim file, the cursor moves very slow (with h and l) in .tex file if the current line is very long.
But if I comment out set history=20, the speed is very fast.
If I comment out the vimtex plugin and keep set history = 20, the speed is also fast.
Do you know why it happens?

minimal.vim

set history=20

call plug#begin('~/.vim/plugged')
    Plug 'lervag/vimtex'
call plug#end()

minimal.tex

\documentclass{minimal}
\begin{document}
hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
\end{document}

Steps to reproduce

1. nvim -u minimal.vim minimal.tex
2. try moving the cursor with h and l on the long line in normal mode.
3. you will find it is very slow.

Expected behavior

Fast moving speed.

Actual behavior

Slow Moving speed.

Do you use a latexmkrc file?

No

VimtexInfo

System info:
  OS: Linux 6.4.10-arch1-1
  Vim version: NVIM v0.9.1
  Has clientserver: true
  Servername: /run/user/1000/nvim.6369.0

VimTeX project: minimal
  base: minimal.tex
  root: /home/user/
  tex: /home/user/minimal.tex
  main parser: current file verified
  document class: minimal
  compiler: latexmk
    engine: -pdf
    options:
      -verbose
      -file-line-error
      -synctex=1
      -interaction=nonstopmode
    callback: 1
    continuous: 1
    executable: latexmk
  viewer: Zathura
    xwin id: 0
  qf method: LaTeX logfile

[lervag]

For me, the delay is not related to the history option - it would be a really strange thing if it was! But delay on long lines are instead caused by the feature for matching highlighted delimiters. You can disable it with let g:vimtex_matchparen_enabled = 0. Or, perhaps better: install vim-matchup as a much better provider of this feature (https://github.com/andymass/vim-matchup).