R help - Sep 2017 - How to add make option to package compilation?

Hi,

  I am installing a lot of packages to a new R installation and it takes a
long time.
  However the machine got 4 cpus and most of the packages are written in
C/C++.

  So is it possible to add a -j4 flag to the make command when I use the
install.packages() function?
  That will probably speed up the package installation process 390%.

Regards
Martin M. S. Pedersen

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On 15/09/2017 8:11 AM, Martin M?ller Skarbiniks Pedersen
wrote:
> Hi,
> 
>    I am installing a lot of packages to a new R installation and it takes a
> long time.
>    However the machine got 4 cpus and most of the packages are written in
> C/C++.
> 
>    So is it possible to add a -j4 flag to the make command when I use the
> install.packages() function?
>    That will probably speed up the package installation process 390%.
See the Ncpus argument in ?install.packages.

Duncan Murdoch

On 15 September 2017 at 14:13, Duncan Murdoch <murdoch.duncan at
gmail.com>
wrote:
> On 15/09/2017 8:11 AM, Martin M?ller Skarbiniks Pedersen wrote:
>
>> Hi,
>>
>>    I am installing a lot of packages to a new R installation and it
takes
>> a
>> long time.
>>    However the machine got 4 cpus and most of the packages are written
in
>> C/C++.
>>
>>    So is it possible to add a -j4 flag to the make command when I use
the
>> install.packages() function?
>>    That will probably speed up the package installation process 390%.
>>
>
> See the Ncpus argument in ?install.packages.

Thanks.

However it looks like Ncpus=4 tries to compile four R packages at the same
time using one cpu for each packages.

From the documentation:
"
   Ncpus: the number of parallel processes to use for a parallel
          install of more than one source package.  Values greater than
          one are supported if the ?make? command specified by
          ?Sys.getenv("MAKE", "make")? accepts argument ?-k
-j Ncpus?
"

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