The node/js implementations provide a stream interface to bitcoin, for watching transactions live and doing real-time updates. Its very difficult to do that wit

The node/js implementations provide a stream interface to bitcoin, for watching transactions live and doing real-time updates. Its very difficult to do that with the bitcoind API because it is only polling functions. Whereas push/event-based handlers and filters are natural on a node implementation (eg watch all new transactions for a particular bitcoin address, how to do that using bitcoind, without long polling?).