Autoblog's performance and algorithm

I'm concerned about the plugin's performance for syncing bbpress content, as it seems to be running a cron job and I would like to know what's the algorithm that is being used for moving the data around and if that will work just fine when there is a large database. To be up to date the syncing has to be as frequent as possible. But if that process kills a lot of server resources that is not a good thing.