Could R CMD check be using valgrind to run the examples? Valgrind has to interpret CPU instructions manually to be able to warn about results of code execution depending on memory values it considers undefined, so it is much slower than execution on a real CPU.
One way to verify that on a GNU/Linux system would be to temporary insert system('pstree -aps $$') into one of the examples and look at the output produced. -- Best regards, Ivan ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel