signal and slot in qt examples

For example, when the user clicks the mouse or presses keys on a keyboard a signal is emitted Signals can also be emitted when something happens inside the

Qt Signal & Slot implementation is deterministic, but it's using QVariant to box and then unbox values, so there is definitely a performance

qt connect signal slot QT library · Qt::DirectConnection

qt signal and slot For example, instead of Having written a few kioslaves decades ago, I feel pretty qualified to comment on Qt's signalslot performance