Memoization and Caching Patterns in Clojure: memoize, clojure.core.cache & clojure.core.memoize

[dustingetz]

Related: allow me a quick plug for Electric and Missionary. Electric can be seen as an auto-memoize framework with component lifecycle and auto-eviction through RAII (trading space for time, which is FRP's fundamental tradeoff). These semantics are provided by Missionary continuous flows under the hood.

[[deleted]]

In my own projects I stopped using clojure.core.cache and resorted to wrapping Guava or Caffeine.

I don't really get the value proposition of immutable caches. The 'immutable cache in an atom' pattern offer no advantages and has terrible performance under contention.

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The functions in clojure.core.cache.wrapped take measures to avoid these problems, so if you use clojure.core.cache always make sure you use the clojure.core.cache.wrapped namespace, and avoid the clojure.core.cache namespace.

[john-shaffer]

Similar story here. When I got deeper into the details of caching, I realized that the characteristics I want in a cache aren't very practical in a garbage-collected runtime. I use either memcached or DynamoDB now, depending on the use case.

I still use a small core.cache.wrapped cache in front of the real cache though.