Because accessing fields in a binary format is a seek() while in a text format it is much more complicated. Try to build a mental model what is required to pars

Because accessing fields in a binary format is a seek() while in a text format it is much more complicated. Try to build a mental model what is required to parse text based formats. You can have a look to results of performance testing involving these binary message formats vs json. http://zderadicka.eu/comparison-of-json-like-serializations-json-vs-ubjson-vs-messagepack-vs-cbor/ http://zderadicka.eu/comparison-of-json-like-serializations-... https://github.com/ludocode/schemaless-benchmarks#speed---desktop-pc https://github.com/ludocode/schemaless-benchmarks#speed---de... https://eng.uber.com/trip-data-squeeze/ https://eng.uber.com/trip-data-squeeze/ http://ugorji.net/blog/benchmarking-serialization-in-go http://ugorji.net/blog/benchmarking-serialization-in-go