[omaranto]

On an old netbook (remember those?) Vim would lag just entering text in insert mode when I was editing LaTeX files (and​ only LaTeX files as far as I could tell). Slowness of LaTeX syntax highlighting is a known problem (the help files have a section called tex-slow). Trying all the suggestions there didn't speed things up enough for me. I tried editing without syntax highlighting for a while (this did work and completely solved the lag), but eventually just switched to Emacs.