Improve speed/cache

[MoOx]

Currently we (advise to) disable all the cache but that can be pretty slow and not super relevant when you run a lot of tests (eg via AVA).
Maybe we should find a way to use another cache and "just" delete this cache when starting a process, so a runtime cache can be used (when I run a lot of tests, it's very probable that I don't update any file during the command runtime)
Any thoughts.?

[MoOx]

Maybe we could use a dynamic BABEL_CACHE_PATH

[istarkov]

As I remember the only reason to clear cache is this issue #36
In most situations css and non js is not changed,
so may be to use some local check does css has changed or not.

Like BABEL_DISABLE_CACHE=$(checkCRC appPath=./src mask='css,scss') but I'm not sure this will work with mocha-ava watch mode.

[ctrlplusb]

It's become unbearably slow for myself running with the cache disabled... :(

[istarkov]

Too short summer in Russia ;-), (wakeboarding and other fun things available only at summer)
so until it ends I almost have no time to opensource activity.

[ctrlplusb]

Haha, awesome. Have fun! Thanks for letting us know anyways.