I noted v8 in my comment; it won't be a panacea. It certainly doesn't fix the encoding/decoding overhead of BSON<->JavaScript, but the JIT and multithreading wi

I noted v8 in my comment; it won't be a panacea. It certainly doesn't fix the encoding/decoding overhead of BSON<->JavaScript, but the JIT and multithreading will help in other areas. Group still will not become sharding-capable with v8, either.