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for (unsigned i = 0; i < 100000; ++i)in the original code is to run the code being benchmarked many times so as to be able to more accurately measure the time taken to execute it—measurements that would otherwise be compromised by limited timer resolution and/or jitter caused by other processes (including the OS) unpredictably preempting this one. It is true that the benchmarked code does take much, much less time to execute if you run it only once!code formattingfor names of programs, only things that are actual shell commands or source-code names of functions or variables. It's bad for screen readers