Cache Details (TTL? LRU?)

[RobertAron]

I'm slightly worried about my application memory performance. We have a large number of keys used. I think I want to implement a TTL cache, but before doing that I want to insure that doing that kind of customization is even necessary.

I read this but it isn't really clear what the end result was.
#92 (comment)

What is the default implementation? Does the cache grow infinitely? Does it ever throw away keys if the size cache becomes large?

[msdrigg]

I was looking this over for myself (user, not maintainer), and from what I can tell the cache grows indefinitely.

I came to this conclusion because the default cache provider is a plain js Map object (

swr/_internal/src/utils/config.ts

Line 44 in e510955

const [cache, mutate] = initCache(new Map()) as [Cache<any>, ScopedMutator]

). So unless there is some magic under the hood that I can't see, there is currently no built in support for TTL, LRU or anything. You would need to use a SwrConfigProvider and supply your own cache.