C/C++统计算法运行时间代码

guohaolys

平常测试个PCL算法的效率，常用代码分享了。
#include < ctime >

time_t tstart, tend;

tstart = time(0);
//your scripts
//
//end
tend = time(0);
cout << “It took ” << difftime(tend, tstart) << ” second(s).” << endl;

It worked fine for me.

Well, if you want to be as precise as possible, then use the following C code, which is at microsecond resolution:

#include <time.h>

double tstart, tstop, ttime;

tstart = (double)clock()/CLOCKS_PER_SEC;

/* YOUR CODES */

tstop = (double)clock()/CLOCKS_PER_SEC;

ttime= tstop-tstart; /*ttime is how long your code run */