Implement caching for node count

Hello and thanks for a great module!

When I was using devel to investigate the number of db queries I noticed that there would be several hundred queries generated by the _taxonomy_menu_term_count function. Looking through the issues I found this old post http://drupal.org/node/1355260 and simply added the caching code to the _taxonomy_menu_term_count function - and it seems to be working well!

Would you consider adding this (or similar) functionality to the module?

Here is what my code looks like if anybody is interested in trying it out for themselves:

function _taxonomy_menu_term_count($tid) {
  // Construct a cache ID
  $cid = 'taxonomy_menu:term_count:' . $tid;

  // Try to get the item from the cache
  $cache = cache_get($cid);
  if ($cache) {
    // If we got it from the cache, return that.
    return $cache->data;
  }

  // It is not in the cache, so we issue a query
  $result = db_select('taxonomy_index', 'tn');
  $result->condition('tid', $tid);
  $result->join('node', 'n', 'n.nid = tn.nid AND n.status = 1');
  $result->addExpression('COUNT(n.nid)', 'term_count');
  $temp = $result->execute();
  $temp = $temp->fetchObject();
  $data = $temp->term_count;

  // We store it in the cache
  cache_set($cid, $data, 'cache', REQUEST_TIME + 1215);
  // We return the result
  return $data;
}