> objc_msgsend, which is _much_ slower than a virtual function call or even a Qt signal. objc_msgsend is slower than a virtual function, but like 1.1x-2x, not

> objc_msgsend, which is _much_ slower than a virtual function call or even a Qt signal. objc_msgsend is slower than a virtual function, but like 1.1x-2x, not 10x. (In rare cases it can even be faster due to it being a little more predictor-friendly.) https://www.mikeash.com/pyblog/friday-qa-2016-04-15-performance-comparisons-of-common-operations-2016-edition.html https://www.mikeash.com/pyblog/friday-qa-2016-04-15-performa...