simple es6 promise util.
npm install --save git+https://git@github.com/anzerr/promise.util.git
npm install --save @anzerr/promise.utilLook at tests for more usage examples
const promise = require('promise.util');
const data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
promise.measure(() => {
return promise.each(data, () => promise.delay(1000), 5);
}).then((res) => {
console.log(Math.round(res / 1e9)) // 2
});