Performance of multiple topics per KafkaConsumer vs. multiple single topic KafkaConsumer

[cer]

• The KafkaConsumer is single threaded
• The single thread dispatches to multi-threaded message handling logic (SwimlaneDispatcher). See enhancements #57

Would having multiple single topic KafkaConsumers - and multiple processing threads - further improve performance?

An Eventuate application could accomplish the same thing by having multiple per-channel subscriptions (with unique subscriber ids subscriber-X-<channel>