count-watchers.debug.js

'use strict';

angular.module('app.main')
    .run(function ($rootScope, $timeout, $log) {
        function countAngularWatchers() {
            var i, data, scope,
                count = 0,
                all = document.all,
                len = all.length,
                test = {};

            // go through each element. Count watchers if it has scope or isolate scope
            /* eslint no-for-loops:0 */
            for (i = 0; i < len; i++) {
                /* global angular */
                data = angular.element(all[i]).data();
                scope = data.$scope || data.$isolateScope;
                if (scope && scope.$$watchers) {
                    if (!test[scope.$id]) {
                        test[scope.$id] = true;
                        count += scope.$$watchers.length;
                    }
                }
            }
            $log.debug('this page has', count, 'angular watchers');
            return count;
        }

        $rootScope.$on('$stateChangeSuccess', function (event) {
            $timeout(function () {
                countAngularWatchers();
            }, 250);
        });
    });