Implement cache

[alexander-akait]

That would be great, at the moment only eslint have cache, in stylelint we working at this stylelint/stylelint#2270 👍 Moved from remarkjs/remark-lint#120

[wooorm]

👍

[wooorm]

By the way, have you checked the --watch option with the CLI? That uses some caching!

[ChristianMurphy]

It would also be nice if the cache strategy could be pluggable.
A linter's caching needs are different than a transformer's, etc.

[ChristianMurphy]

Another possible approach could be storing the cache as part of a vFile abstraction, see vfile/ideas#2

[StarpTech]

Hi, what kind of cache are we talking about?
What's the issue here?

I use tools like https://github.com/azz/pretty-quick/blob/master/README.md to speed up the formatting process. I could imagine a simple package which pass a list of all changed files to unified (based on git)