Woah nice find. This is outta control. I think our new infinite scroll library will make this better. That should be in the next release and I’ll personally keep a close eye on this. Pretty wild. Thanks for reporting!

Just checked mine, 1.6 gigs of cache. Anything over a couple hundred megs is extreme.

LRU cache seems like a good choice for caching images. Then set a max size and/or age of items in the cache and evict as necessary. This is the defacto caching mechanism in Apps.