QNetworkRequestFactory creation takes a long time

Hi,

Doing a simple benchmark.

QElapsedTimer timer;
timer.start();

factory = std::make_shared<QNetworkRequestFactory>(url);

qDebug() << u"Main: The operation took"_s << timer.elapsed() << u"milliseconds"_s;

The operation takes 50ms on first pass.

Any subsequent call takes 0ms. So it seems the creation of the first factory is slow. Any subsequent one works as expected.