Ember: Loading Substate Entry Threshold - Prevents the loading substate from entering when not needed

gistfile1.js

var ApplicationRoute = Ember.Route.extend({
    actions: {
      /*
       * Ensures that the loading substate is not entered until at least
       * 500ms of waiting for the model to resolve
       */
      loading: function() {
        var scheduledIntermediate = Ember.run.later(this, function() {
          this.intermediateTransitionTo('loading');
        }, 500);

        this.router.one('didTransition', function() {
          Ember.run.cancel(scheduledIntermediate);
        });

        return false;
      }
    }
});