UT_timediff

    UT_timediff      344 modules/pw/protocol_whois.c        elapsed = UT_timediff( &begintime, &endtime);
    UT_timediff      161 modules/sq/mysql_driver.c       seconds = UT_timediff( &start_time, &stop_time );
    UT_timediff      120 modules/ta/ta.c   session = UT_timediff( &tas->sessionstart, reftime );
    UT_timediff      121 modules/ta/ta.c   task    = UT_timediff( &tas->taskstart, reftime );