cachePackage cache implements both in-memory and on-disk caching.
cacheContextPackage cacheContext implements a context.Context wrapper which caches the results of Value calls, speeding up subsequent calls for the same key.
lazyslotPackage lazyslot implements a caching scheme for globally shared objects that take significant time to refresh.
lruPackage lru provides least-recently-used (LRU) cache.

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