+/*
+ * For special applications where we only want the thread id, reading
+ * in all metadata is a heavy I/O penalty.
+ */
+const char *
+_notmuch_message_get_thread_id_only (notmuch_message_t *message)
+{
+
+ Xapian::TermIterator i = message->doc.termlist_begin ();
+ Xapian::TermIterator end = message->doc.termlist_end ();
+
+ message->thread_id = _notmuch_message_get_term (message, i, end,
+ _find_prefix ("thread"));
+ return message->thread_id;
+}
+
+