Hi,
I am having difficulties in getting the latest version of the bssm
(https://github.com/helske/bssm) package to CRAN, as the pretest issues a NOTE
that the package uses too many cores in some of the examples ("Examples with
CPU time > 2.5 times elapsed time"). I've seen plenty of discussion about this
issue in relation to the data.table package, but bssm does not use it. Also,
while bssm uses OpenMP in some functions, these are not called in the example
in question (?exchange), and by default the number of threads in the
parallelisable functions is set to 1.
But I just realised that bssm uses Armadillo via RcppArmadillo, which uses
OpenMP by default for some elementwise operations. So, I wonder if that could
be the culprit? However, I would think that in such case there would be many
other packages with RcppArmadillo encountering the same CRAN issues. Has anyone
experienced this with their packages which use RcppArmadillo but not
data.table, or can say whether my guess is correct? I haven't been able to
reproduce the issue myself on r-hub or my own linux, so I can't really test
whether setting #define ARMA_DONT_USE_OPENMP helps.
Best,
Jouni
[[alternative HTML version deleted]]
______________________________________________
R-package-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-package-devel
