Should I use QCoreApplication::processEvents() or QApplication::processEvents()?

Question

I have a method which is called from both QThreads and the main thread. this method can sometimes take a long time to do its computations in a loop so I put

Answer 1

Neither, processEvent() should be calld only when you have actual pending events to process. You may find this useful : How to make Qt work when main thread is busy?