[R] byte coding compiling.....

[Rui Barradas]

Hello,

Sorry to intrude in this thread but what NeedsCompilation means is that 
the package contains C, C++ or Fortran native code in a directory named src.

 From the documentation, Writing R Extensions, section 1.1.1 The 
DESCRIPTION file:


The ‘NeedsCompilation’ field should be set to "yes" if the package 
contains native code which needs to be compiled, otherwise "no" (when 
the package could be installed from source on any platform without 
additional tools). This is used by install.packages(type = "both") in R 
 >= 2.15.2 on platforms where binary packages are the norm: it is 
normally set by R CMD build or the repository assuming compilation is 
required if and only if the package has a src directory.


And package parallel does have a src directory with C code.


[1] 
https://cran.r-project.org/doc/manuals/r-release/R-exts.html#The-DESCRIPTION-file


Hope this helps,

Rui Barradas

Às 16:38 de 07/07/2022, akshay kulkarni escreveu:
> Dear Uwe,
>                    I have attached the info from the parallel package description from my Rstudio IDE:
> 
> Package: parallel
> Version: 4.1.2
> Priority: base
> Title: Support for Parallel computation in R
> Author: R Core Team
> Maintainer: R Core Team <do-use-Contact-address using r-project.org>
> Contact: R-help mailing list <r-help using r-project.org>
> Description: Support for parallel computation, including by forking
>     (taken from package multicore), by sockets (taken from package snow)
>     and random-number generation.
> License: Part of R 4.1.2
> Imports: tools, compiler
> Suggests: methods
> Enhances: snow, nws, Rmpi
> NeedsCompilation: yes
> Built: R 4.1.2; x86_64-w64-mingw32; 2021-11-01 18:38:05 UTC; windows
> 
> It says: NeedsCompilation: yes
> 
> How about it?
> 
> Yours sincerely,
> AKSHAY M KULKARNI
> 
> ________________________________
> From: Uwe Ligges <ligges using statistik.tu-dortmund.de>
> Sent: Thursday, July 7, 2022 4:08 PM
> To: akshay kulkarni <akshay_e4 using hotmail.com>; Bert Gunter <bgunter.4567 using gmail.com>
> Cc: R help Mailing list <r-help using r-project.org>
> Subject: Re: [R] byte coding compiling.....
> 
> 
> 
> On 06.07.2022 19:54, akshay kulkarni wrote:
>> Dear Bert,
>>                    Thanks for your reply...
>>
>> So
>>> cmpfun(mclapply)
> 
> mclapply is already byte compiled as it is in a package.
> 
> You may want to
> cmpfun(yourFunction)
> the function that you use in the mclapply call.
> 
> Best,
> Uwe Ligges
> 
> 
>>
>> should  do the job right?
>>
>> By the by, how can I give a reprex? Reprex of the code that I am giving to mclapply (as FUN argument)?
>>
>> Yours sincerely,
>> AKSHAY M KULKARNI
>> ________________________________
>> From: Bert Gunter <bgunter.4567 using gmail.com>
>> Sent: Wednesday, July 6, 2022 10:32 PM
>> To: akshay kulkarni <akshay_e4 using hotmail.com>
>> Cc: R help Mailing list <r-help using r-project.org>
>> Subject: Re: [R] byte coding compiling.....
>>
>> Unlikely
>>
>> See here:
>>    https://www.r-bloggers.com/2017/08/how-to-make-best-use-of-the-byte-compiler-in-r/
>>
>> Byte code compilation should be automatic in both cases, as I understand it. Of course, I could be wrong due to special features of parallel  programming, etc.
>>
>> A reprex might be helpful here.
>>
>> Cheers,
>> Bert
>>
>>
>> On Wed, Jul 6, 2022, 7:29 PM akshay kulkarni <akshay_e4 using hotmail.com<mailto:akshay_e4 using hotmail.com>> wrote:
>> Dear members,
>>                             I am using pbmclapply, the progress bar version of mclapply, from the parallel package. The point is, pbmclapply is three times faster than mclapply, and I think the most probable reason would be that pbmclapply is byte code compiled (I can think of no other reason).
>>
>> I know the cmpfun function from compiler package. If I do:
>>
>>> cmpfun(mclapply)
>>
>> will the job be done? The point is mclapply may look for other functions in the parallel package. So I have to compile the whole package right? How do you do that? or in general, how do you byte code compile a whole package?
>>
>> Thanking you,
>> Yours sincerely,
>> AKSHAY M KULKARNI
>>
>>           [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help using r-project.org<mailto:R-help using r-project.org> mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>         [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.