GUI keyboard repeat rate suffers with many long lines

Steps to reproduce

1. Open MacVim (mvim --clean)
2. Create a line 80 characters long (80ii<Esc>)
3. Go to beginning of line (0)
4. Hold down 'l' and time how long it takes to get to the end of the line (for me, about 3 seconds)
5. Delete this line (dd)
6. Create a line 700 characters long (700ii<Esc>)
7. Make 90 copies of this line (yy90p)
8. Go to column one, row one (1G0)
9. Hold down l and time how long it takes to get to column 80 (for me, about 6 seconds)

(This affects insert repeat rate as well as cursor motion.)

(Also, I don't think this was a problem before the recent update to 9.0, but I could be wrong.)

Expected behaviour

The repeat rate shouldn't be affected by the data in the buffer.

Version of Vim and architecture

VIM - Vi IMproved 9.0 (2022 Jun 28, compiled Jul 25 2022 08:23:03) macOS version - x86_64 Included patches: 1-65

Environment

MacOS 11.6.4
MacVim GUI

How MacVim was installed

Internal update; originally installed from download

Logs and stack traces

No response

Vim configuration where issue is reproducable

No response

Issue has been tested with given configuration

• by running MacVim.app from GUI macOS interface
• by running vim/gvim/etc installed by MacVim
• by running other versions of vim (e.g. /usr/bin/vim)

Issue has been tested with no configuration

• by running mvim --clean (or gvim, supplied by MacVim distribution)
• by running vim --clean (in terminal, supplied by MacVim distribution)
• by running vim --clean (in terminal, other suppliers, e.g. /usr/bin/vim)

Other conditions

• The both Homebrew packages "vim" and "macvim" are installed

Commencez par reproduire le ralentissement dans MacVim avec mvim --clean, en utilisant les étapes du rapport avec des lignes courtes et des lignes longues répétées, puis comparez le comportement de l’interface graphique avec les exécutions de Vim propre dans le terminal indiquées. Suivez le chemin de répétition du clavier et de déplacement du curseur de l’interface graphique ; le travail est terminé lorsque la vitesse de répétition ne dépend plus du contenu du tampon dans les cas signalés.