[binaryapparatus]

Interesting, I don't often use Python but recent project had few 3000+ lines .py files, which make Vim _very_ unresponsive when editing. Other languages weren't so problematic but Python code is what made me look at Emacs direction at the first place.

[brennebeck]

This surprises me. How does it make vim unresponsive? I frequently open multi-GB sql files without vim choking. Are you using some particular plugins?

[binaryapparatus]

I was using/am using:

    Plug 'tmhedberg/SimpylFold'
    "Plug 'python-mode/python-mode', { 'branch': 'develop' }
    "let g:pymode_python = 'python3'

... in different combinations. Deleting any char takes surprising amount of time, so much so that I usually mark block to delete instead of char by char even if it is three char block. Of course I may be using wrong plugins, however that's what I found that should be used in various articles online.

[brennebeck]

Sorry to hear that. Might be worth reporting to the plugin authors, as I don’t think it’s an inherent issue with vim. When editing the sql files I’m referring, it includes syntax highlighting, etc. so I would assume it should work just fine in other cases. But I’m not really dealing with large py files, in general, so I can’t say specifically.