title: How avoid helper running each time Meteor.user() changes
body: <p>I have the following helper in Meteor:</p>
  
  <pre><code>fullname(){
    return Meteor.user().currentName;
  },
  </code></pre>
  
  <p>But this helper runs every time <code>Meteor.user()</code> changes. I only want it to run when <code>currentName</code> of the user changes, not for example just <code>firstName</code>.</p>