On Safari are results were within 3% of each other. On Brave "for loop, negative" was 84% faster than "for of". This small sample (2 browsers on macOS) align w

On Safari are results were within 3% of each other. On Brave "for loop, negative" was 84% faster than "for of". This small sample (2 browsers on macOS) align with my expectations of "Good luck optimizing JavaScript that has dozen of different implementations".