Nodejs parallel check

parallet-check.js

/**
 * Long Function
 * It will take 2 seconds to resolve
 */
const longFunc = async () => {
  const second = 2;
  return new Promise((solve) => {
    setTimeout(() => {
      console.log('Hello World');
      solve(true);
    }, 1000 * second);
  });
};
/**
 * Number of iteration
 */
const noi = 8;
/**
 * Async / Parallel Programming
 */
const asyncFunc = async () => {
  let promiseArr = [];
  for (let i = 0; i < noi; i++) promiseArr.push(longFunc());
  await Promise.all(promiseArr);
};
/**
 * Synchronize Programming
 */
const syncFunc = async () => {
  for (let i = 0; i < noi; i++) await longFunc();
};
/**
 * Main
 */
(async () => {
  const startTime = Date.now();

  /**
   * Async / Parallel or Synchronize Function NAME to run test
   * Does the same job but huge difference in efficient & performance
   */
  await asyncFunc(); // takes 2 seconds
  // await syncFunc(); // takes 16 seconds

  const endTime = Date.now();
  console.log(`Iteration: ${noi} | ${(endTime - startTime) / 1000} seconds`);
})();