How to evaluate the time to run iterations per UDF

Valérie Gelbgras

How to evaluate the time to run iterations per UDF

Valérie Gelbgras

We can use the function defined in the librairy time.h. An example is given below. With the macro DEFINE_ADJUST, we evaluate the clock time before the iteration. With the macro DEFINE_EXECUTE_AT_END, we evaluate the clock time after the iteration. Finally, we write the the elapsed time in a text file.

#include "udf.h"
#include <time.h>
clock_t start_t, end_t;
DEFINE_ADJUST(start_t_evaluation,domain)
{
    start_t=clock();
}

DEFINE_EXECUTE_AT_END(end_t_evaluation)
{   
    FILE *fp=fopen("time_monitor.txt","a");
    
    end_t=clock();
    
    fprintf(fp, "%d seconds for iteration # %d\n",(end_t-start_t)/ (CLOCKS_PER_SEC),N_ITER);
    
    fclose(fp); 
}