c语言计算函数消耗时间

  c语言计算函数消耗时间:

 

 

#include <sys/time.h>
#include <unistd.h>

struct timeval tv1, tv2;
double sec = 0 ;
gettimeofday( & tv1, 0 );

HEGGTOPCOLLECTOR hTopCollector = eggTopCollector_new( 0 ); // top 10

gettimeofday( & tv2, 0 );
sec = ( double )(tv2.tv_sec - tv1.tv_sec) + ( double )(tv2.tv_usec - tv1.tv_usec) / 1000000 ;
printf( " time1: %f\n " , sec);