compare-promise-all-and-promise-allSettled.js

const SamplePromise = (index) => {
	return new Promise((resolve, reject) => {
		setTimeout(() => {
			resolve(`Promise ${index}`);
		}, 1000);
	});
};

const withoutPromiseAll = () => {
	console.time('Without Promise.all');

	[...Array(10).keys()].map(async (index) => {
		await SamplePromise(index);
	});

	console.timeEnd('Without Promise.all');
};
withoutPromiseAll();

const withPromiseAll = () => {
	console.time('With Promise.all');

	Promise.all([...Array(10).keys()].map(async (index) => {
		await SamplePromise(index);
	}));

	console.timeEnd('With Promise.all');
};
withPromiseAll();

const withPromiseAllSettled = () => {
	console.time('With Promise.allSettled');

	Promise.allSettled([...Array(10).keys()].map(async (index) => {
		await SamplePromise(index);
	}));

	console.timeEnd('With Promise.allSettled');
};
withPromiseAllSettled();