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) 17.83441 27.49096 31.10495 37.14751 37.74022
##       max neval
##  38.33293     3
microbenchmark(xu <- msgpack_unpack(xpk), times=3)
## Unit: milliseconds
##                       expr      min      lq   mean   median       uq
##  xu <- msgpack_unpack(xpk) 136.3251 176.347 192.69 216.3689 220.8725
##       max neval
##  225.3761     3