Faster vertical movement in vim

.vimrc

" Faster up and down movement bindings.
nnoremap <C-k> :-5<CR>
inoremap <C-k> <Esc>:-5<CR> i
nnoremap <C-j> :+5<CR>
inoremap <C-j> <Esc>:+5<CR> i
nnoremap <C-Up> :-5<CR>
inoremap <C-Up> <Esc>:-5<CR> i
nnoremap <C-Down> :+5<CR>
inoremap <C-Down> <Esc>:+5<CR> i

key-repeat-rates.sh

# Run the following commands in your terminal (Mac OS) to increate the key repeat rate.

# Normal minimum is 15 (225 ms)
defaults write -g InitialKeyRepeat -int 10

# Normal minimum is 2 (30 ms)
defaults write -g KeyRepeat -int 1