> such micro-optimizations are totally unnecessary because modern CPUs are so fast that instructions are almost free.
I'm amazed by the fact there is always someone who will say that such optimization are totally unnecessary.
I'm amazed by the fact there is always someone who misinterprets Knuth's "premature optimization", reading as "don't optimize" instead of "pull out the profiler"
Some people have significant positions on CPU manufacturers, so there will always be at least a few.