Will signal "broadcast" faster than calling function through for loop?

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I'm facing a situation like there are about more than 1k instances of a class, where a method of the class should be called frequently. Since the current implementation is through maintaining a list of the instances and calling the method using a for loop and it hurts the real-time requirement of the application, I'm considering the signal and slot mechanism from Qt.

The question is: if i change the method into a slot and connect it with a signal while the instance got created, and instead of calling the method through a for loop, i emit a signal. Will it be faster than the for-loop solution?



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