亞微秒級別的時間測量

Windows:GetSystemTimePreciseAsfileTime

Linux: clock_gettime  https://ubuntuqa.com/article/9295.html

                                                     https://www.91r.net/ask/7935545.html

                                                    https://stackoverflow.com/questions/7935518/is-clock-gettime-adequate-for-submicrosecond-timing