Not yet. We have been asked to compare ION to Flatbuffers, Cap'n Proto, Thrift, Avro, Transit, BSON and several other encodings. However, writing the benchmarks

Not yet. We have been asked to compare ION to Flatbuffers, Cap'n Proto, Thrift, Avro, Transit, BSON and several other encodings. However, writing the benchmarks and going through the features systematically is a lot of work, so we have not yet had the time to go through them all.