the "virtualGeometryChanged" signal is triggered multiple times

#include "mainwindow.h"
#include <QScreen>
#include <QGuiApplication>
#include <QDebug>
#include <QTime>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)

{
#if 1
    connect(QGuiApplication::primaryScreen(), &QScreen::virtualGeometryChanged, [=] () {
        qInfo() << QTime::currentTime().toString("hh:mm:ss:zzz");
    });
#else
    QGuiApplication::primaryScreen()->setOrientationUpdateMask( Qt::LandscapeOrientation | Qt::PortraitOrientation);
    connect(QGuiApplication::primaryScreen(), &QScreen::orientationChanged, [=] () {
        qInfo() << QTime::currentTime().toString("hh:mm:ss:zzz");
    });
#endif

}

MainWindow::~MainWindow()
{

}