start = System.currentTimeMillis();
for (requests = 0; requests < SAMPLE_SIZE; requests++) {
ZMsg req = new ZMsg();
req.addString("hello");
req.send(client);
ZMsg.recvMsg(client).destroy();
}
System.out.printf(" %d calls/second\n",
(1000 * SAMPLE_SIZE) / (System.currentTimeMillis() - start));