Optimmize memory usage by only fetching the necessary attributes used for contacts listing

program/lib/Roundcube/rcube_ldap.php

@@ -193,8 +193,14 @@ class rcube_ldap extends rcube_addressbook
         $rcube = rcube::get_instance();
         $this->cache = $rcube->get_cache('LDAP.' . asciiwords($this->prop['name']), 'db', 600);
 
-        // initialize ldap wrapper object
+        // determine which attributes to fetch
         $this->prop['attributes'] = array_merge(array_values($this->fieldmap), $fetch_attributes);
+        $this->prop['list_attributes'] = $fetch_attributes;
+        foreach ($rcube->config->get('contactlist_fields') as $col) {
+            $this->prop['list_attributes'] = array_merge($this->prop['list_attributes'], $this->_map_field($col));
+        }
+
+        // initialize ldap wrapper object
         $this->ldap = new rcube_ldap_generic($this->prop, true);
         $this->ldap->set_cache($this->cache);
 
@@ -567,7 +573,7 @@ class rcube_ldap extends rcube_addressbook
             return $group_members;
 
         // read these attributes for all members
-        $attrib = $count ? array('dn','objectClass') : $this->prop['attributes'];
+        $attrib = $count ? array('dn','objectClass') : $this->prop['list_attributes'];
         $attrib[] = 'member';
         $attrib[] = 'uniqueMember';
         $attrib[] = 'memberURL';
@@ -605,15 +611,14 @@ class rcube_ldap extends rcube_addressbook
     {
         $group_members = array();
 
-        for ($i=0; $i < $entry['memberurl']['count']; $i++)
-        {
+        for ($i=0; $i < $entry['memberurl']['count']; $i++) {
             // extract components from url
             if (!preg_match('!ldap:///([^\?]+)\?\?(\w+)\?(.*)$!', $entry['memberurl'][$i], $m))
                 continue;
 
             // add search filter if any
             $filter = $this->filter ? '(&(' . $m[3] . ')(' . $this->filter . '))' : $m[3];
-            $attrs = $count ? array('dn','objectClass') : $this->prop['attributes'];
+            $attrs = $count ? array('dn','objectClass') : $this->prop['list_attributes'];
             if ($result = $this->ldap->search($m[1], $filter, $m[2], $attrs, $this->group_data)) {
                 $entries = $result->entries();
                 for ($j = 0; $j < $entries['count']; $j++) {

program/lib/Roundcube/rcube_ldap_generic.php

@@ -412,6 +412,9 @@ class rcube_ldap_generic
                         $this->_debug("S: ".($errmsg ? $errmsg : ldap_error($this->conn)));
                     }
                 }
+                else if ($this->debug) {
+                    $this->_debug("S: ".ldap_count_entries($this->conn, $ldap_result)." record(s) found");
+                }
 
                 $this->result = new rcube_ldap_result($this->conn, $ldap_result, $base_dn, $filter, $vlv_count);
 

program/lib/Roundcube/rcube_ldap_result.php

@@ -100,7 +100,9 @@ class rcube_ldap_result implements Iterator
 
     function current()
     {
-        return ldap_get_attributes($this->conn, $this->current);
+        $attrib = ldap_get_attributes($this->conn, $this->current);
+        $attrib['dn'] = ldap_get_dn($this->conn, $this->current);
+        return $attrib;
     }
 
     function key()