https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100133
--- Comment #2 from 康桓瑋 <hewillk at gmail dot com> --- After actually executing the same code on my local and remote servers, I did not produce such a result. In both cases, std::copy achieved the expected high-efficiency performance, so I think this should only be Quick C++ Benchmark Own question, thank you for your time