I need to run asynchronous JavaScript functions in a loop. I need this to test the performance of my web application.

SpeedTest.asyncLoop = function(iterations, func, callback)
{
    var index = 1;
    var done = false;
    var loop = {
        next: function()
        {
            if (done)
            {
                return;
            }
            if (index <= iterations)
            {
                index++;
                func(loop);
            }
            else
            {
                done = true;
                callback();
            }
        },

        iteration: function()
        {
            return index - 1;
        },

        stop: function()
        {
            done = true;
            callback();
        }
    };
    loop.next();
    return loop;
};

//Call it here
    SpeedTest.asyncLoop(10,
        function(loop) {
            MyAsyncFunction(function() {
                Common.log(loop.iteration());
                loop.next();
            });
        },
        function(){
            Common.log( 'Test done');
        }
    );

//Here is the function that will be called 10 times in a loop
function MyAsyncFunction(callback){
    //Call here
    if (typeof callback === "function")
    {
        callback();
    }
}