A code snipper for memoized getter performance test

memoized-getter.js

// Required only nodejs
const { performance } = require('perf_hooks');

const obj = {
  get memoizedGetter() {
    delete this.memoizedGetter;
    return this.memoizedGetter = [...Array(5e+7).keys()].reduce((prev, num) => prev + num, 0);
  },
  get commonGetter() {
    return [...Array(5e+7).keys()].reduce((prev, num) => prev + num, 0);
  },
};

const measureExecutionTime = (functionName, fn) => {
  const start = performance.now();
  fn();
  return `[${functionName}] Elasped Time: ${performance.now() - start} ms`;
};

console.log(measureExecutionTime('Memoized Getter Test1', () => obj.memoizedGetter));
console.log(measureExecutionTime('Memoized Getter Test2', () => obj.memoizedGetter));
console.log(measureExecutionTime('Memoized Getter Test3', () => obj.memoizedGetter));

console.log(measureExecutionTime('Common Getter Test1', () => obj.commonGetter));
console.log(measureExecutionTime('Common Getter Test2', () => obj.commonGetter));
console.log(measureExecutionTime('Common Getter Test3', () => obj.commonGetter));