easy-memoizer v1.0.0

easy-memoizer

Store the results of expensive function calls and return the cached result when the same inputs occur again. Supports both synchronous and asynchronous functions.

Synchronous usage

const { memoizeSync } = require('../memoizer.js');

const expensiveSyncFn = (x, y) => {
    for (let i = 0; i < 1e10; i++);
    return x + y;
};

const fnSync = memoizeSync(expensiveSyncFn, (x, y) => `${x}-${y}`);

// It will take some time to print
console.log(fnSync(3, 4));
// Prints instantly
console.log(fnSync(3, 4));

Asynchronous usage

const { memoizeAsync } = require('../memoizer.js');

const expensiveAsyncFn = (x, y) => new Promise((resolve, reject) => {
    setTimeout(() => resolve(x + y), 3000);
});

const fnAsync = memoizeAsync(expensiveAsyncFn, (x, y) => `${x}-${y}`);

// Printing after 3000ms
console.log(await fnAsync(3, 4));
// Prints instantly
console.log(await fnAsync(3, 4));

Installation

npm install easy-memoizer