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 . -- Regards Dmitriy Selivanov
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