Memoization of promise-based function

Question

How can I memoize a promise-based function?

Would straightforward memoization of the function suffice?

function foo() {
    return new Promise((reso         


        

Answer 1

Memoization and promises aren't obvious. Even worst with the new async / await syntax.

in order to get somewhint like that working:

memoize(async () => 42) 

or

const whatsTheAnswerToLifeTheUniverseAndEverything = () => 42
memoize(whatsTheAnswerToLifeTheUniverseAndEverything) 

You need a memoize function or library which supports promises and async syntax. A couple of them: - https://github.com/aboutlo/async-memo-ize (Disclosure: I did this lib) - https://github.com/medikoo/memoizee

Notice: Memoization is a cool technique however you save CPU resources at the cost of a memory consumption. You should take care how those libraries approach this issue at scale ;)