Google Drive/Stream and the Bridge Cache

Hello, I'm wondering if anyone can help with some general information on the Bridge cache working with Google Drive and Stream. I'm using Drive to hold video clips and accessing them from a couple of different computers ( and users). The functionality is just fine. I have it set up so everything is syncing properly. My only concern is the time it takes to generate thumbnails in Bridge. Would it be better to store my cache locally or on Drive? Sometimes, thumbnails won't generate at all. If the cache is stored locally (as it is by default), would purging the cache affect the files for other users/computers that access them on Drive? Thank you.