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This performace test (LatencyTT) shows the latency , round trip time, with two topics. 
One for sending from publisher to subscriber and one for sending back from subscriber to publicher.
The other Latency test (LAtency) shows the latency, round trip time, with one topic.
The test can run with different options.


-	run_test.pl : start one publisher and one subscriber in different processes
	with resp. Plan_sub.cdp and Plan_pub.cdp


To test changes in the next attributes, changes this values in the publisher cdp-files:
iterations : the number of messages per run to send. Has to be greater as 0.
sleep:  time in ms to sleep before writing the next message