Promise performance

promise_performance3.js

Promise.all([promise(1000), promise(2000), promise(3000)])
    .then((msgs) => {
        msgs.forEach(msg => {
            console.log(msg)
        });
        console.log(`End of Promise.all(..)`)
    })

//Result
/* 
    Promise 1000 start
    Promise 2000 start
    Promise 3000 start
    Promise 1000 end
    Promise 2000 end
    Promise 3000 end
    End of Promise.all(..) 
*/