Since JCA message inflow creates a transaction for every message, one project I have got involved before, experienced performance problem on their ESB like framework. We solved it with receiving multiple messages in one transaction.

It would be great if we add similar to the SwitchYard like following:
https://gist.github.com/3876644

Keith suggested that we may be able to have this as a common component library or core extension so we can use this feature not only on JCA but on other components.