function persist_menu(lime_test $t, ioDoctrineMenuItem $rt, ioMenuItem $menu)
{
    $timer = new sfTimer();
    $rt->persistFromMenuArray($menu->toArray());
    $timer->addTime();
    $rt->refresh(true);
    $t->info(sprintf('### Menu took %s to persist (%s nodes/min)', round($timer->getElapsedTime(), 4), floor(8 * 60 / $timer->getElapsedTime())));
}