Count All Watchers Currently Running on an AngularJS Page

count-watchers-angularjs.js

(function () { 
    // Change root to point at your ng-app in HTML
    var root = $(document.getElementsByTagName('body'));
    var watchers = [];

    var f = function (element) {
        if (element.data().hasOwnProperty('$scope')) {
            angular.forEach(element.data().$scope.$$watchers, 
                function (watcher) {
                    watchers.push(watcher);
                }
            );
        }

        angular.forEach(element.children(), 
            function (childElement) {
                f($(childElement));
            }
        );
    };

    f(root);

    console.log("Watchers Count: " + watchers.length);
})();