Going further, writing just C code to replicate what the Objective-C runtime actually does (dynamic dispatch) is also slower than Objective-C and it's hand-tune

Going further, writing just C code to replicate what the Objective-C runtime actually does (dynamic dispatch) is also slower than Objective-C and it's hand-tuned, written-in-assembler runtime at those same tasks. So, Objective-C (at least on Apple's operating systems) is as fast as C AND faster than C at a few highly specific things.