> What's interesting, however, is the disparity in the sender-to-receiver ratios. ZeroMQ is capable of sending over 5,000,000 messages per second but is only able to receive about 600,000/second.
IIRC the sent messages get stuffed in a buffer in the sender process. If the sender process crashes it will take the already-sent-but-not-really messages with it.
My understanding is that the "foreground" thread gives the message to a background ZeroMQ thread, which then transmits them as fast as it can; therefore, this number is probably somewhat misleading, but I'm not sure how else you could measure it.
IIRC the sent messages get stuffed in a buffer in the sender process. If the sender process crashes it will take the already-sent-but-not-really messages with it.