Dear list, independent of the thread on this list about slow examples on R 4.2 on windows I have discovered over the last few days that some of my benchmarks (look for t4 and t9) run by a factor of 3 slower on R 4.2.x than on R 4.1.3 [1].
This is on Linux, using my own backported R packages for R 4.2.x and locally compiled versions (with default configure options) of R-4-1-branch on two different CPUs. The results for R 4.2.1 are only slightly modulated by the use of different BLAS version (openblas-serial versus atlas versus lapack). I also tested the R 4.0.4 version that is part of Debian bullseye, it is as fast as the locally compiled R 4.1.3. I went through the NEWS for R 4.2.0 (because the first slow results were obtained using that version), but the only change I could imagine causing such a change is the additional check of the length of the arguments && and ||. Any other thoughts? Johannes [1] https://pkgdown.jrwb.de/mkin/articles/web_only/benchmarks.html#results [[alternative HTML version deleted]] ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
