There is a DEALER that sends messages and receives identical messages in a batch.
There is the ROUTER that just sends back what it receives to the sender. I tested JeroMQ, labview-zmq, jzmq, and PyZMQ. The test source code is at https://github.com/crocket/ZeroMQThroughputTest To summarize the test results on a windows xp sp3 32bit system with 3GB RAM, for messages of 10 bytes, JeroMQ >> jzmq >>> PyZMQ >>> labview-zmq for messages of 1 kilobytes, JeroMQ = jzmq = PyZMQ >>> labview-zmq for messages of 10 kilobytes, JeroMQ = jzmq = PyZMQ = labview-zmq Below are the test results. Why is labview-zmq so slow when sending small messages? It's just a wrapper around libzmq like jzmq and PyZMQ. 1) JeroMQ It took 1.59 seconds to process 600000 messages of size 10 Byte(s) in a batch 376411.54 messages/second It took 35.81 seconds to process 600000 messages of size 1.0 KiloByte(s) in a batch 16754.16 messages/second It took 304.89 seconds to process 600000 messages of size 10.0 KiloByte(s) in a batch 1967.92 messages/second 2) jzmq It took 4.63 seconds to process 600000 messages of size 10 Byte(s) in a batch 129729.73 messages/second It took 34.30 seconds to process 600000 messages of size 1.0 KiloByte(s) in a batch 17494.75 messages/second It took 48.36 seconds to process 100000 messages of size 10.0 KiloByte(s) in a batch 2067.82 messages/second (If I try to send 600,000 messages of 10 kilobytes in a batch, it says "not enough space".) 3) PyZMQ It took 6.51 seconds to process 150000 messages of size 10Byte(s) in a batch 23021.58 messages/second It took 8.78 seconds to process 150000 messages of size 1.0Kilobyte(s) in a batch 17081.85 messages/second It took 73.78 seconds to process 150000 messages of size 10.0Kilobyte(s) in a batch 2033.03 messages/second 4) labview-zmq It took 11.79 seconds to process 40000 messages of size 10Byte(s) in a batch 3390.73 messages/second It took 13.70 seconds to process 40000 messages of size 1.0Kilobyte(s) in a batch 2919.04 messages/second It took 20.67 seconds to process 40000 messages of size 10.0Kilobyte(s) in a batch 1935 messages/second
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