js批量异步调用,并发数量控制

asyncTest.js

var RES_MAX = 10;
var count = 0;
function foo () {
    if (count > RES_MAX) {
        //出让cpu,等待并发任务完成
        return process.nextTick(foo);
    }

    //do the real work here
    count ++;
    AAA.save(function(){
        count --;
    });
    return process.nextTick(foo);
}

foo();