Vimtex+YouComplteMe: How to disable autocompletion on plain text?

Question

I have recently setup vimtex and YCM as the associated autocompleter. These work great in their intended scenario, however I believe the autocompleter is giving suggestions when I am typing plain text and I want to avoid that. It is causing some lag and I want to get rid of them.

Is there anyway to set up vimtex with YCM so that I do not get suggestions when typing plain text?

EDIT: To clarify I want to configure YCM (if possible) so that in a *.tex file:

1. I do not have autocomplete popups for plain text.
2. I would only like popups for LaTeX specific syntax to appear, e.g, commands, environments, labels, etc.

Answer 1

From :help YCM

YCM has a g:ycm_filetype_blacklist option that lists filetypes for which
YCM shouldn't be turned on. YCM will work only in filetypes that both the
whitelist and the blacklist allow (the blacklist "allows" a filetype by _not_
having it as a key).

My blacklist (in my .vimrc) looks like this, and YCM isn't triggered for plaintext files:

let g:ycm_filetype_blacklist = {
            \ 'tagbar': 1,
            \ 'notes': 1,
            \ 'netrw': 1,
            \ 'unite': 1,
            \ 'text': 1,
            \ 'vimwiki': 1,
            \ 'pandoc': 1,
            \ 'infolog': 1,
            \ 'leaderf': 1,
            \ 'mail': 1
            \}