title: Doctrine query memory usage
body: <p>Doctrine appears to be taking well over 4MB of RAM to execute a single, simple query:</p>
  
  <pre><code>print memory_get_peak_usage()." &lt;br&gt;\n";
  $q = Doctrine_Query::create()
      -&gt;from('Directories d')
      -&gt;where('d.DIRECTORY_ID = ?', 5);
  
  $dir = $q-&gt;fetchOne();
  print $dir['name']." ".$dir['description']."&lt;br&gt;\n";
  
  print memory_get_peak_usage()." &lt;br&gt;\n";
  
  /***************  OUTPUT:  **************************
  
  6393616
  testname testdescription
  10999648
  
  /***************************************************/
  </code></pre>
  
  <p>This is on a test database with very little data in it - the item that I am querying doesn't contain any data other than what is displayed here.</p>
  
  <p>Is there potentially something wrong with the way I have the system set up, or is this standard memory usage for Doctrine?</p>