IdeaVim is faster and less laggy than VSCodeVim in my experience.
You can even use a custom ~/.ideavimrc and bind leader shortcuts to JetBrains actions. I rarely ever touch the mouse in IntelliJ now. It's an ultra-productive environment to have the power of IntelliJ, the convenience of vim, and Spacemacs/Doom Emacs style shortcuts.
For example, to manage projects:
nnoremap <leader>po :action ManageRecentProjects<CR>
nnoremap <leader>pc :action CloseProject<CR>
Or to create/switch git branches:
nnoremap <leader>gb :action Git.Branches<CR>
Or to bring up the nav bar to change or create new files (Ctrl/Cmd + N once the nav bar is visible):
nnoremap <leader>fn :action ShowNavBar<CR>
Or to summon git blame annotations in the current file (repeat to dismiss them):
nnoremap <leader>ga :action Annotate<CR>
Or manipulate windows:
" Window movement.
map <leader>wv :vsplit<CR>
map <leader>ws :split<CR>
map <leader>wd <C-W>c
map <leader>wx <C-W>c
map <leader>ww <C-W>w
map <leader>wl <C-W>l
map <leader>wh <C-W>h
map <leader>wk <C-W>k
map <leader>wj <C-W>j
map <leader>wo <C-W>o
Or summon “Refactor This” at the cursor point:
nnoremap <leader>rt :action Refactorings.QuickListPopupAction<CR>
You can get a list of available actions for your current environment and plugins with the :actionlist command.
I only started playing with this recently but my current config is here for those interested:
https://gist.github.com/nickcernis/bcb5cb7f55c07ed3de8287d16...
It takes a bit of searching and fiddling, but once you hide all the chrome (I even hide tabs at Editor → General → Editor Tabs → Tab Placement = None), install IdeaVim and configure shortcuts how you want them IntelliJ feels just as slick as a tricked-out Emacs/vim, but with better out-of-the-box code intelligence.
On Mac I also remap Ctrl+hjkl system-wide so that I can navigate IntelliJ popovers with vim-ish shortcuts. I use Karabiner for this with the “Vi Mode, left_control + hjkl. shift/option/command + arrow working” option on this page: https://ke-complex-modifications.pqrs.org/?q=%20PC-Style%20S...