I didn't see this in 'shortmess' options, so I am posting this here so that maybe someone can help me or empathize and perhaps submit a patch (I have never done that and don't know how vim works at all--sorry).

Every time I press i_CTRL-N I get all of the messages that you should see below in the code snippet--one for every file. It is causing a lot of clutter. I don't necessarily rely on :messages, but I do use it perhaps more than most people (sometimes I refer to it for fixed lint errors and sometimes for debugging small vimscripts which are actually a significant routine in my work life, since I have found it necessary to automate many things and customize the crap out of certain things).

(1 of 2): Command line completion: Scanning for tags doesn't check for typed key now and
Scanning: js/banana.js
Scanning: js/foo.js
Scanning: js/bar.js
Scanning: foo.html
Scanning: data/data.txt
Scanning: ../index.html
Scanning: styles/foo.css
Scanning tags.
1 line less; before #2269  2 seconds ago

I would sincerely appreciate if someone could fix this or suggest a fix. Perhaps another option in 'shortmess' would be helpful. I even tried inoremap <silent> <c-n> <c-n> and inoremap <silent> <c-p> <c-p> and it didn't work.