MessagePack itself is an efficient binary serialization format. It lets you exchange data among multiple languages like JSON. But it is faster and smaller. Small integers are encoded into a single byte, and typical short strings require only one extra byte in addition to the strings themselves. RcppMsgPack brings both the C++ headers of MessagePack as well as clever code (in both R and C++) Travers wrote to access MsgPack-encoded objects directly from R.
Changes in version 0.2.1 (2018-01-15)
Some corrections and update to DESCRIPTION, README.md, msgpack.org.md and vignette (#6).
c_pack.cppand tests (#7).
More efficient packing of vectors (#8).
Support for timestamps and NAs (#9).
Conditional use of microbenchmark in
tests/as required for Suggests: package [CRAN request] (#10).