High CPU with localStorage reference

I am developing an Angular 1.4.5 application that uses a service to access the localStorage object to store/retrieve data in a persistent manner.  But as soon as I add a reference to the localStorage object in the editor, the CPU starts spiking between 30% - 60%, and does not come down until I either close that JavaScript file or remove the command.  Here is a sample that causes the issue for me every time, regardless of the file:

'use strict';
angular.module('myApp')
  .service('myService', [
    function () {
      var x = localStorage.getItem('myData');
      return {};
    }
  ]);

Any help is appreciated.  Sort of hard to code when the keyboard buffer is constanly lagging.

Thanks!