您可以在基于Unix的系统或子系统上使用time命令:

you can use the time command on Unix based systems or subsystems:

time echo "Hello world"

时间运行echo "Hello world"
需要多长时间 它具有毫秒级的精度，并显示了在程序上花费了多少时间，等待系统以及总的执行时间

to time how long it takes to run echo "Hello world"
It has millisecond precision, and shows how much time was spent in the program, waiting on the system and the total execution time

在这里看看

http://***.com/Questions/588307/c-obtaining-milliseconds-time-on-linux-clock-doesnt-seem-to-work-properly [

Have a look here

http://***.com/questions/588307/c-obtaining-milliseconds-time-on-linux-clock-doesnt-seem-to-work-properly[^]

请参见 clock_gettime [

See clock_gettime[^] man page.
:)