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this post was submitted on 17 Jul 2023
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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.
I don't like every app having its own max size, I'd hope Android at some point starts making an automatic cache control tool system-wide (that's not a third party app) but it seems we're stuck with this mechanism
It is a bit of wishful thinking, but could be cool if they had an AndroidX package with some kind of global caching system. Problem is though, how do you make a caching mechanism that can fit all use cases.
Start with LRU and maybe a frequency counter to keep frequently useful data. Then go from there. Same as most apps do themselves right now but redistribute as needed; slowly take a bit away from all other apps when one app needs more