On 23/02/2023 1:11 p.m., Ben Bolker wrote:
    Not important (of course) but where does the 5000 kWh per tree number
come from?  Is that (dry weight) x (50% carbon per dry weight) / (carbon
content of CO2 emissions per kWh) ?

https://www.epa.gov/energy/greenhouse-gas-equivalencies-calculator#results

    If we say 200 watts x 15 minutes (allowing us to take up the whole
server for checking on 5 different platforms) we have .05 kWh. Let's say
we do this 300 times/year for a package, so 15 kWh. Hard to get 'tree
equivalents' from the EPA web site, but this is equivalent to 1.2
gallons of petrol/gasoline consumption (0.011 metric tonnes)

Another missing part of the calculation is how many kWh are saved because frequent checks find bugs early and prevent the need to throw away long simulation runs.

And Github claims to have been carbon neutral since 2019...

Duncan


On 2023-02-23 12:59 p.m., Duncan Murdoch wrote:
Hi Martin.

I think your calculations are way off.  A one-tonne tree contains about
5000 kWh of energy.  A typical computer server uses about 200 watts, and
can process many jobs simultaneously on different cores, but let's say
the whole server is dedicated to the Github action.  Then it would
consume 1 kWh in 5 hours, and would take about 10 days to consume 1% of
a tree.

Duncan Murdoch

On 23/02/2023 11:29 a.m., Martin Maechler wrote:
Spencer Graves
      on Tue, 21 Feb 2023 05:25:39 -0600 writes:

      > On 2/21/23 2:34 AM, Vasileios Nikolaidis wrote:
      >> Yes, with all this I can think where I may have messed up. So
thanks for
      >> the help, at least it verified it is indeed an issue with the
code. As
      >> far as OSs, I use Ubuntu variants a lot and (on several
machines) but
      >> these days I have easier access to Windows (with WSL2 btw). I
also like
      >> a strict compiler (and linker), there is usually a reason why
they are
      >> strict. So if it is not obvious from examining the code,  I
will set up
      >> something (be it WSL, VM or Docker) for testing.


      > If you have NOT tried "GitHub Action" yet, I highly recommend it.
      > For my packages, every time I do "git push", it automatically
runs "R
      > CMD build / check" on 5 different platforms -- with no further
effort on
      > my part other than checking the results.

[ Sorry, but for once I'd like to raise this here ...]:

well... how many "trees" does that cost every time you push?
I guess it will be less than one, but I'd also guess it be more
than 1% of one.. and even if that was more than reality, ...

I hope you are all aware that even though this looks "free", all
this mostly unnecessary (rebuilding some of the things *every*
time from scratch, downloading lots of stuff, even though from a
closeby server) traffic and server run time will partly be paid
by the kids and grand kids of people living in Bangladesh,
Polynesia, ... (and maybe even in say Amsterdam)
Global Warming *is* a threat, and we living in rich nations letting run
more and more computer networks and servers (cooling, heating,
gray energy including lots of CO2 produce by building construction, ...)
does add to it.

[[[yes, I may be partly wrong,  and
      no, it's a loss of time if we start a flame/mud/... war here
about this;
      just consider it a small outlier voice ...
]]]


      > It should be easy to get something to work following the
instructions
      > in Wickham and Bryan, R Packages[1] or copying the code from
another
      > package.[2] If that fails, you might be able to get help from
this list.
      > I got valuable suggestions from Dir Eddelbuettel and Duncan
Murdoch.


      > I don't know if any version of Debian is available on GitHub
Action.
      > However, if CRAN is rejecting your package on GitHub Action, a
question
      > about that to this list might help make it available.  If you have
      > special Ubuntu configuration issues that are not provided in the
      > standard GitHub Action configurations, asking here might help
you with
      > that.


      > Hope this helps,
      > Spencer Graves


      > [1]


      > https://r-pkgs.org


      > [2] e.g.,


      > https://github.com/JamesRamsay5/fda

      >>
      >> Thanks again,
      >>
      >> Vasilis
      >>
      >>
      >>
      >> Στις 2023-02-20 23:09, Dirk Eddelbuettel έγραψε:
      >>> On 20 February 2023 at 22:37, Vasileios Nikolaidis wrote:
      >>> | Thanks for taking the time to check it. The hint about the
virtual
      >>> | 'layer' class is valuable.
      >>> | I will look into it.
      >>>
      >>> Sounds good, glad to have been of assistance.  On a lark, I
also tried
      >>> your
      >>> most recent CRAN release, and it installs and loads fine here.
      >>>
      >>> | PS I am tempted to set up a Debian test platform to speed
up fixing the
      >>> | package.
      >>> | (Or abandon submitting the package to CRAN alltogether.)
      >>>
      >>> I love working on Linux. And these days I hear from some
friends that
      >>> having
      >>> WSL2 on a (recent enough) Windows computer is also good as it
effectively
      >>> gives a second machine with Ubuntu on it.  Docker can also be
helpful,
      >>> as are
      >>> the online resources -- rhub has helped me with both macos
and windows
      >>> builds.
      >>>
      >>> Dirk
      >>
      >> ______________________________________________
      >> R-package-devel@r-project.org mailing list
      >> https://stat.ethz.ch/mailman/listinfo/r-package-devel

      > ______________________________________________
      > R-package-devel@r-project.org mailing list
      > https://stat.ethz.ch/mailman/listinfo/r-package-devel

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