示例程序如下：#include#include#includeintmain(void){intresult=0，我;结构timespectt1,tt2;clock_gettime(CLOCK_PROCESS_CPUTIME_ID,&tt1);对于（i=0；i<10；i++）{结果+=随机（）；}clock_gettime(CLOCK_PROCESS_CPUTIME_ID,&tt2);printf("used%ldnanoseconds!\n",tt2.tv_nsec-tt1.tv_nsec);}编译运行如下：$gccdemo_clocktime.c-odemo_clocktime$./demo_clocktimeused1298nanoseconds!如上所述，这种侵入式性能测量一般用于早期开发。邮箱：MingruiZhou@outlook.com
