How do I make this JS function asynchronous?

Question

function takesTime(){

    for (var i = 0; i

        

Answer 1

for (var i = 0; i < someVeryLargeNumber; ++i) {
    setTimeout(function () {
        //do something synchronous
    }, 0);
}

Also see setZeroTimeout to gain a few milliseconds each loop, although the work people are doing there seems to be browser-based.