QStateMachine: heigh load for waiting on events only

QStateMachine machine;

QState* parallel = new QState(QState::ParallelStates, &machine);
machine.setInitialState(parallel);

for (int i = 0; i < 10 * 1000; i++) {
    QState* group = new QState(parallel);
    QState* s1 = new QState(group);
    group->setInitialState(s1);
}

QEventLoop loop;
connect(&machine, SIGNAL(finished()), &loop, SLOT(quit()));

machine.start();
loop.exec();