jquery.betterScroll.js

// set dalay on scroll event to prevent huge memory leaks
(function($) {
  var uniqueCntr = 0;
  $.fn.scrolled = function (waitTime, fn) {
    if (typeof waitTime === "function") {
        fn = waitTime;
        waitTime = 50;
    }
    var tag = "scrollTimer" + uniqueCntr++;
    this.scroll(function () {
        var self = $(this);
        var timer = self.data(tag);
        if (timer) {
            clearTimeout(timer);
        }
        timer = setTimeout(function () {
            self.removeData(tag);
            fn.call(self[0]);
        }, waitTime);
        self.data(tag, timer);
    });
  }
})(jQuery);

// USAGE
$(window).scrolled(100, function() { // set optional delay time as first param and pass function
  // your code here
});