3 ms·

Blockchains are highly inefficient for decentralized consensus as well.

• darawk 7y ago
  But they are the most efficient known solution to the problem. Efficiency is relative.
  • tadfisher 7y ago
    No, they are the most efficient known solution to global consensus for double-spend. There are alternatives that relax the constraints using extra information such as connections in the network to get a relatively good approximation of the global consensus. See Safecoin, for example.