sunxiaoguang

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

long long elapsed(struct timeval *start, struct timeval *end) {
    return (end->tv_sec * 1000000l + end->tv_usec) - (start->tv_sec * 1000000l + start->tv_usec);
}