title: rxjs modular imports and bundle size (webpack2/angular2 cli)
body: <p>If I have a component -- Component A -- with imports such as:</p>
  
  <pre><code>import { Observable } from 'rxjs/Observable';
  import 'rxjs/add/operator/map';
  </code></pre>
  
  <p>and I have another component -- Component B -- with duplicate imports:</p>
  
  <pre><code>import { Observable } from 'rxjs/Observable';
  import 'rxjs/add/operator/map';
  </code></pre>
  
  <p>And I build using a <code>ng build --prod</code> will the <code>CLI</code> de-duplicate the imports or will I have 2x copies of each import in my bundle? Furthermore will the <code>--aot</code> option have any impact? If you don't know, then do you have an suggestions on how I can test this?</p>