Thrift vs CQL3 performance

[bi kro]

Hi every one,

I'm newcomer to Cassandra, so I would like to know about performance 
between Thrift (Hector) vs CQL3, specially about the speed (Thrift based 
on RPC, CQL3 based on binary protocol).

Currently I'm using Cassandra 1.2 , which version CQL3 of 
JavaDriver-Datastax is stable for it?

Thanks very much