title: Optimal way to convert XML to Objects
body: <p>I'm creating an app on Google App Engine using Java, which accepts a standard XML file and maps it to an object- which is then saved to the datastore. </p>
  
  <p>I'm expecting quite a bit of entries/day (about 500+).. What is the optimal way of serializing xml, considering the cost in CPU and Data quotas of GAE/j?</p>