[R-pkg-devel] Slowdown running examples since 4.2 on Windows
Performance changes on that scale really ought to be either documented as expected behaviour, or treated as a bug (either in WinBuilder's job scheduling or R 4.2). I noticed some large variability in WinBulder elapsed times last time I submitted a package update so there are probably some capacity constraints in it driving this behaviour.
On Thu, 30 Jun 2022 at 06:26, Barbara Lerner <blerner at mtholyoke.edu> wrote:
I have a package that I want to submit an updated version for but the examples run too slowly on win-builder since 4.2 came out. I just submitted the exact same tar.gz file to all 3 versions of R available on win-builder and got the results shown below. Notice the dramatic slowdown from 4.1.3 to 4.2.1. I don't know how to go about tracking down the cause of this slowdown. The examples are quite small. I am reluctant to use \dontrun, but I am not sure what else to do. June 29 2:33 PM - old release * using R version 4.1.3 (2022-03-10) i386 timings name user system elapsed prov.json 3.28 0.33 5.19 prov.run 2.70 0.27 4.18 x64 timings name user system elapsed prov.json 3.51 0.27 4.93 prov.run 3.05 0.28 4.48 June 29 2:19 PM - release * using R version 4.2.1 (2022-06-23 ucrt) * using platform: x86_64-w64-mingw32 (64-bit) name user system elapsed prov.json 16.98 8.81 26.82 prov.run 3.53 0.42 4.89 June 29 1:52 PM - devel * using R Under development (unstable) (2022-06-28 r82534 ucrt) * using platform: x86_64-w64-mingw32 (64-bit) name user system elapsed prov.json 16.60 9.09 26.66 prov.run 3.57 0.22 4.70 I then ran the same timing script as win-builder uses on my Mac, using Rscript and got these results: name user system elapsed prov.json 1.105 0.159 1.329 prov.run 0.890 0.103 1.053 session_info reports: version R version 4.2.0 (2022-04-22) os macOS Catalina 10.15.7 system x86_64, darwin17.0 I then installed 4.2.1 on my Mac. The time is a little slower but nothing like the slowdown on Windows. name user system elapsed prov.json 1.286 0.230 3.080 prov.run 0.940 0.108 1.131 version R version 4.2.1 (2022-06-23) os macOS Catalina 10.15.7 system x86_64, darwin17.0 -- <http://www.getpostbox.com>Barbara Lerner (she / her) Professor Computer Science Department Mount Holyoke College <http://www.getpostbox.com> [[alternative HTML version deleted]]
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