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

Bắt đầu bằng cách tái hiện hiện tượng chậm trong MacVim với mvim --clean, sử dụng các bước với dòng ngắn và dòng dài được lặp lại trong báo cáo, rồi so sánh hành vi của GUI với các lần chạy Vim sạch trong terminal được liệt kê. Theo dõi đường đi của thao tác lặp phím và di chuyển con trỏ trong GUI; công việc được xem là hoàn tất khi tốc độ lặp không còn phụ thuộc vào nội dung buffer trong các trường hợp được báo cáo.