Plugin Settings

when in doubt go with the default settings 🙂

-> keep “also aggregate inline JS” as that might cause cache size issues
-> don’t “inline all CSS” as that can make the HTML very bulky
-> “eliminate render-blocking CSS” can help performance a lot, but you’ll need to tell AO what CSS to inline to style the site until the full CSS is loaded. If you’re interested in that, have a look at the “inline & defer CSS” parts of the AO FAQ 🙂

happy optimizing,
frank

Afraid one sentence in my previous response was lacking an important word:

-> keep “also aggregate inline JS” as that might cause cache size issues

should be

-> keep “also aggregate inline JS” off as that might cause cache size issues

the same goes for “also aggregate inline CSS” actually.

Regarding negative impact; cache size warning are an indicator of more important issues, see https://blog.futtta.be/2016/09/15/autoptimize-cache-size-the-canary-in-the-coal-mine/ so indeed better to avoid by configuring as described above.

the screenshot URL does not work, can you re-post it?

you probably will also have to disable the 3rd option “also aggregate inline CSS” to avoid cache size warnings.