title: Javascript - using sessionStorage vs variables
body: <p>I have an Ext-JS(Sencha) mobile application. After a user logs in, i load some data from the server in which I store in  variables for the users session.
  I was wondering if it was better to use sessionStorage vs putting these into variables, or if it even made a difference. (The data is sometimes pretty large, but it's not static enough to put into localStorage).</p>
  
  <p>Are there any advantages to using sessionStorage, from a performance standpoint, over in-memory variables ?</p>
  
  <p>Thanks</p>