When should I use RequestFactory vs GWT-RPC?

Question

I am trying to figure out if I should migrate my gwt-rpc calls to the new GWT2.1 RequestFactory cals.

Google documentation vaguely mentions that RequestFactory is a

Answer 1

The only caveat I would put in is that RequestFactory uses the binary data transport (deRPC maybe?) and not the normal GWT-RPC.

This only matters if you are doing heavy testing with SyncProxy, Jmeter, Fiddler, or any similar tool that can read/evaluate the contents of the HTTP request/response (like GWT-RPC), but would be more challenging with deRPC or RequestFactory.