Qt signal is ten times slower than a virtual function

PyQt4 has a unique signal and slot mechanism to deal with events Signals and slots are used for communication between objects A signal is

import SIGNAL class MyPlugin: def __init__: super __init__ # Give QObjects

pyqt signal slot The signal is connected to the close slot of the QMainWindow class Communicate: closeApp = pyqtSignal() A signal is created with the

book your slot The following example uses the PyQt_PyObject value declaration with an old-style signal-slot connection, and again when the signal is emitted,