R Developers, Could someone help explain what it means that R is single threaded? I am trying to understand what is actually going on inside R when users want to parallelize code. For example, using mclapply or foreach (with some backend) somehow allows users to benefit from multiple CPUs.
Similarly there is the RcppParallel package for RMatrix/RVector objects. But none of these address the general XPtr objects in Rcpp. Some readers here may recognize my question on SO ( http://stackoverflow.com/questions/37167479/rcpp-parallelize-functions-that-return-xptr) where I was curious about parallel calls to C++/Rcpp functions that return XPtr objects. I am being a little more persistent here as this limitation provides a very hard stop on the development on one of my packages that heavily uses XPtr objects. It's not meant to be a criticism or intended to be rude, I just want to fully understand. I am willing to accept that it may be impossible currently but I want to at least understand why it is impossible so I can explain to future users why parallel functionality is not available. Which just echos my original question, what does it mean that R is single threaded? Kind Regards, Charles [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
