On 10 December 2018 at 13:04, Jan van der Laan wrote: | Small addendum: A large part of the performance gain in my example comes | from using NumericVector instead of std::vector<double>. Which avoids a | conversion. An example using std::copy with Numeric vector runs in the | same time as the version using memcpy.
+1 That sounds reasonable and matches my experience: std::memcpy is good yet std::copy may itself be implemented with using it. And ussing care with the interface is important: std::vector<> has its own memory allocation scheme so we cannot do without a copy which we notice here in the timings. 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
