What's the difference between Apache ActiveMQ and Apache ActiveMQ Apollo?

Apollo documents says:"ActiveMQ Apollo is a faster, more reliable, easier to maintain messaging broker built from the foundations of the original ActiveMQ. It accomplishes this using a radically different threading and message dispatching architecture.", but there isn't java sample code and good user guide.

Does Anyone use ApacheActiveMQApollo in live environment? Do better performance to original ActiveMQ?

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