Using RcppMsgPack

RcppMsgPack

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

flowchart 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.

Installation:

  1. Install.packages("RcppMsgPack")

Example:

See tests/tests.r for more examples.

library(RcppMsgPack)
library(microbenchmark)

x <- 1:1e6
microbenchmark(xpk <- msgpack_pack(x), times=3)
## Unit: milliseconds
##                    expr      min       lq     mean   median       uq
##  xpk <- msgpack_pack(x) 19.70474 27.11776 32.06556 34.53078 38.24597
##       max neval
##  41.96117     3
microbenchmark(xu <- msgpack_unpack(xpk), times=3)
## Unit: milliseconds
##                       expr      min       lq     mean   median       uq
##  xu <- msgpack_unpack(xpk) 138.0003 174.9089 198.0832 211.8176 228.1247
##       max neval
##  244.4319     3