They state that performance is untested. While this is interesting for transporting binary data that needs no encoding or decoding, i suspect the use cases will

They state that performance is untested. While this is interesting for transporting binary data that needs no encoding or decoding, i suspect the use cases will be minimal. JSON is actually highly efficient already. Ebay did benchmarking of the various binary formats for server-to-server api's, and while JSON wasn't the fastest, it was fast enough. http://www.infoq.com/presentations/Dealing-with-Performance-Challenges-Optimized-Data-Formats http://www.infoq.com/presentations/Dealing-with-Performance-...