RcppMsgPack

Convert to and from msgpack objects in R using the official msgpack-c API through Rcpp.

A flowchart describing the conversion of R objects into msgpack objects and back.

Msgpack EXT types are converted to raw vectors with EXT attributes containing the extension type. The extension type must be an integer from 0 to 127.

Maps are converted to data.frames with additional class “map”. Map objects in R contain key and value list columns and can be simplified to named lists or named vectors. The helper function msgpack_map creates map objects that can be serialized into msgpack.

For more information on msgpack types, see here.

library(RcppMsgPack)
library(microbenchmark)

x <- 1:1e6
microbenchmark(xpk <- msgpack_pack(x), times=3)

## Unit: milliseconds
##                    expr      min       lq     mean   median       uq      max
##  xpk <- msgpack_pack(x) 17.63721 17.84506 18.21852 18.05292 18.50918 18.96544
##  neval
##      3

microbenchmark(xu <- msgpack_unpack(xpk), times=3)

## Unit: milliseconds
##                       expr      min       lq     mean   median       uq
##  xu <- msgpack_unpack(xpk) 58.40967 92.90216 130.4936 127.3946 166.5356
##       max neval
##  205.6765     3