get-vs-oc.js

import * as NanoTimer from "nanotimer";
import { get } from "lodash";

const foo = {
  bar: {
    baz: 1,
  },
};

const iterateWithOptionalChaining = () => {
  let value = 0;
  for (let i = 0; i < 1000000; i += 1) {
    value += foo?.bar?.baz ?? 0;
  }
  return value;
};

const iterateWithGet = () => {
  let value = 0;
  for (let i = 0; i < 1000000; i += 1) {
    value += get(foo, "bar.baz", 0);
  }
  return value;
};

const timerA = new NanoTimer();
const ocTime = timerA.time(iterateWithOptionalChaining, "", "u");
const getTime = timerA.time(iterateWithGet, "", "u");
console.log(ocTime);             // 4097.653
console.log(getTime);            // 125579.824
console.log(getTime / ocTime);   // 30.646768772270367