I had that sort of impression as well, but after playing with the benchmark and seeing the assembly code, and checking the actual theoretical throughputs for my

I had that sort of impression as well, but after playing with the benchmark and seeing the assembly code, and checking the actual theoretical throughputs for my microprocessor, I realized that in this case, and previous ones, there was nothing relevant to the results that had to do with the way benchmarking was implemented. These pieces of code would be thought to be in the innermost loop, and practically they might not actually process a very large part of the array. There are solutions, and better approaches, sure, but they pinpoint real issues that cause spread in your performance across microprocessors & compilers that are worth having in mind.