I suspect this benchmark is actually just testing the difference between STOMP and AMQP. RabbitMQ with STOMP is in the same regime as ActiveMQ / Apollo while Ra

I suspect this benchmark is actually just testing the difference between STOMP and AMQP. RabbitMQ with STOMP is in the same regime as ActiveMQ / Apollo while RabbitMQ with AMQP is always 3x-5x faster than itself and others with STOMP. QPID is the only other AMQP competitor and it seems to have performance issues with persistence but the transient performance is always in the same regime as AMQP RabbitMQ. STOMP is a UTF-8 text protocol while AMQP is a binary protocol. This means that every message you send using STOMP requires encoding it in a safe-for-text format (e.g. base64 encoding or similar. I'm not intimately familiar with STOMP). Going on the hypothesis that a STOMP message parser is much slower than an AMQP parser, this would explain why RabbitMQ AMQP does not perform well in the 200 message case while it trounces in the 20k and 200k message case. In the 20k/200k message case the benchmark is mostly looking at time to decode 200k text messages versus 200k binary messages. It's so exceedingly hard to do a benchmark and measure the thing you think you are measuring. Also, I agree with others that the minimal difference between persistent and transient setups is very non-intuitive. The author left out an important detail of whether he was using an SSD or not. Otherwise, I suspect an error in the measurement setup.