On 30 December 2016 at 15:49, Dmitriy Selivanov wrote: | Hello mailing list. Just small announcement. I made package "sparsepp" which | brings bindings to header only 'sparsepp' library - https://github.com/ | greg7mdp/sparsepp. It is on CRAN already. Sparse++ is improvement over google | sparse hash library (see this write-up https://github.com/greg7mdp/sparsepp/ | blob/master/bench.md). | | Initially I evaluated it with my text2vec package, where main data structure | is unordered_map< pair<uint32_t, uint32_t>, T >, where T is int or float. | In my case memory improvement was 2x and speed up was 1.5x (lookup and insert | operations). | | So I decided to build small package which can be used by other people (not | text2vec only). | | Usage is as usual | | 1. add to DESCRIPTION of your package: LinkingTo: sparsepp | 2. add #include <sparsepp.h> to you source/header | 3. use spp::sparse_hash_map as drop-in replacement for std::unordered_map.
Thanks, possibly very useful. Now, should it have at least a 'Suggests: Rcpp' if the example requires it, \dontrun{} or not? Also examine whose project you're posting on. Sure it "could" be used from R without Rcpp. But how likely is that? Suggests is for exactly that reason, at least in my book. Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel