Sequential and Parallel execution with async/await

sequential-parallel.js

const pause = (data, time) => new Promise(resolve => setTimeout(() => resolve(data), time));

const sequentialParallel = async () => {
  console.time('time');

  // Sequential
  // const first = await pause('first', 3000);
  // const second = await pause('second', 2000);

  // Parallel
  // const firstPromise = pause('first', 3000);
  // const secondPromise = pause('second', 2000);
  // const first = await firstPromise;
  // const second = await secondPromise;

  // Also Parallel but much nicer, wow
  const [first, second] = await Promise.all([pause('first', 3000), pause('second', 2000)]);

  console.log('result:', first, second);
  console.timeEnd('time');
};

sequentialParallel();