void CalRunTime() {
auto t1=std::chrono::steady_clock::now();
//run code
auto t2=std::chrono::steady_clock::now();
//毫秒级
double dr_ms=std::chrono::duration<double,std::milli>(t2-t1).count();
//微妙级
double dr_us=std::chrono::duration<double,std::micro>(t2-t1).count();
//纳秒级
double dr_ns=std::chrono::duration<double,std::nano>(t2-t1).count();
//秒
double dr_s=std::chrono::duration<double>(t2-t1).count();
}
转载于:https://www.cnblogs.com/smallredness/p/11066758.html