"You've fallen for the classic fallacy ..."
Utter rubbish! I've "fallen" for no such thing.
Before posting, I'd assumed the assignment incurred some overhead but also considered that an optimisation might have been applied to negate this.
I chose to check it.
The benchmark code indicated the overhead did exist: I posted the code and results to show this.
I made no inferences nor offered any conclusions about the benchmark results.
I wrote that the overhead was "typically negligible".
I see that you excluded that from your opening quote.
Anything, no matter how small, when multiplied enough times will become a bigger thing: that bigger thing "may be significant".
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