Memoize Method Calls in PHP with Cache Decorators

4 Replies to “Memoize Method Calls in PHP with Cache Decorators”

1. Thanks for sharing! Just to let you know that it’s already implemented in Hack language: https://docs.hhvm.com/hack/attributes/special#__memoize

   1. Nice! I didn’t know that, but have to admit that I never actually tried out Hacklang

2. This is CACHE, not memoize. Memoize is for constants, general cache is for variables.
   You cannot memoize anything like $id -> $object _from_external_source (that can be modified or not available.
   The requirement to memoize is that it only works with pure functions(immutable input, immutable output), not with procedures/methods or anything that touches the network or external memory (globals, $this, closures).
   It must be deterministic, you cannot memoize random_bytes or random_int for example. But you can memoize cos, sin, …, you can use memoize for fourier transform (worthy, lengthy but pure).
   In other words, if you cannot map a set A to a set B, it is not memoizable.

   1. Thanks for the clarification!

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