Run spellchecker as a daemon in background

When using hunspell for some time, vis gets rather slow and jerky. My suspicion is that if the spellchecker was run in background as a daemon (using vis-communicate from https://github.com/martanne/vis/pull/675, which has been merged to my repository at https://git.cepl.eu/cgit/vis/, and openSUSE package at https://build.opensuse.org/package/show/home:mcepl:neovim/vis) would make the experience with spell-checking much more pleasant and smooth.