memoize-methods

Memoize methods of a given JavaScript object

usage

Initialize the memoization store. The store will keep the memoized objects for as long as the originals are not garbage collected (it uses a WeakMap).

const memoizeMethods = createMemoizeMethods()

const memoizedUserRepository = memoizeMethods(slowUserDbRepository)

the first call will be as slow as if we'd called the original user repo

const user = await memoizedUserRepository.getUser(userId) // slow

the second call will return the promise from the previous call which prevents the unnecessary repeated async call (e.g. towards a slow db)

const userFast = await memoizedUserRepository.getUser(userId) // fast