Can I ask for few question in one post to XML-RPC server?
If yes, how can I do it in python and xmlrpclib?
I'm using XML-RPC server on slow connection, so I would like to call few functions at once, because each call costs me 700ms.
Whether or not possible support of multicall makes any difference to you depends on where the 700ms is going.
How did you measure your 700ms?
Run a packet capture of a query and analyse the results. It should be possible to infer roughly round-trip-time, bandwidth constraints, whether it's the application layer of the server or even the name resolution of your client machine.
Does XML-RPC in general allows to call few functions at once?