understanding_memoization.js

function slowProduct(a, b) {
  console.time('Execution time')
  for (let i = 0; i <= 10000000; i++) { }

  console.timeEnd('Execution time')
  return console.log(a * b);
}

function memoizeValue(fnc, context) {
  let res = {};

  return function(...args) {
    let argsCache = JSON.stringify(args)

    if (!res[argsCache]) {
      res[argsCache] = fnc.call(context || this, ...args) 
    }
    
    return res[argsCache]
  }
}

for (let count = 0; count <= 5; count++) {
  console.log('normal computing')
  slowProduct(192, 192)
  console.log('memoized value')
  memoizeValue(slowProduct(192, 192))
}