SPEED_ITER
T_TIME_START(SPEED_ITER, MESSAGE_LEN);
for (i = 0; i < SPEED_ITER; i++) {
T_TIME_END(SPEED_ITER, MESSAGE_LEN);
T_TIME_START(SPEED_ITER, LARGE_MESSAGE_LEN);
for (i = 0; i < SPEED_ITER; i++) {
T_TIME_END(SPEED_ITER, LARGE_MESSAGE_LEN);