>>>>> Peter Dalgaard
>>>>> on Wed, 12 Dec 2018 22:12:34 +0100 writes:
> I don't think there has been anything mentioned about slowdowns of that
magnitude, but it's been 3.5 years since 3.1.3.
> Would it be possible to narrow down what kind of code has become slow?
> Since the OS version is different, I assume the first timing is
historical and not easily redone, but if it is now using like 70 times as long
as before, chances are that it is spending 69/70 of the time in the same few
places.
> One generic frequent cause of grief with simulations is to keep onto the
fitted models in entirety, including model frames etc., causing massive memory
build-up.
> -pd
If the simulationR-R.R script is basically reproducible
(i.e. does not use data or other resources that only exist on
your computer), it would probably be useful if you "donated"
it to the R project by making it publicly available. Some of
us do have many old R versions still running, and could quickly
try and see...
Martin Maechler (not a Mac user though)
>> On 12 Dec 2018, at 17:39 , Cowan, R (MERIT)
<r.co...@maastrichtuniversity.nl> wrote:
>>
>> I am running a small simulation, and getting very different run times
when I use different versions of R.
>> Two set-ups using the same machine (MacBook Pro 2013 vintage)
>>
>> 1. R version 3.1.3 running on system OS X 10.9.5
>>
>>> system.time(source("simulationR-R.R"))
>>
>> user system elapsed
>> 3.890 0.061 3.965
>>
>> Compared to
>>
>> 2. R version 3.5.1 running on system OS X 10.12.6
>>
>>> system.time(source("simulationR-R.R"))
>>
>> user system elapsed
>> 277.924 2.087 280.841
>>
>> The source code is identical. This is a pretty big difference running
the same code on the same hardware.
>> Before submitting the code, is this a known issue?
>>
>>
>> Thanks,
>> Robin Cowan
>> _______________________________________________
>> R-SIG-Mac mailing list
>> R-SIG-Mac@r-project.org
>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Office: A 4.23
> Email: pd....@cbs.dk Priv: pda...@gmail.com
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