[Rd] Compiling R scripts
B.Rowlingson at lancaster.ac.uk
Mon Jul 4 16:22:04 CEST 2005
Uzuner, Tolga wrote:
> Dear R Developers,
> It would help if R scripts could be compiled into an executable, or a
Are you sure it would help? If you do a big matrix operation in R it
runs at the speed of the underlying C code. It wont get much faster.
Profile your code, find out where the time is being spent, then optimise
> Speed is the main issue (I run a large scale monte carlo in
> R which is very slow).
The reason its very slow is not because its 'in R' but because it is a
'large scale monte carlo'. What was a 'large scale' monte-carlo ten
years ago runs in no time today. 'large scale' == 'slow' almost by
Unless you've done comparisons with the same code written in some
> However, it would also make it easier to link
> R into other applications, easier at least than the COM
> infrastructure under Windows.
R can be called from C, and there are application links to Python,
Perl, Java... Easy enough.
> Finally, it would make it much easier to farm R apps: rather than
> distributing all of R and necessary libraries onto each client, and
> making sure each client is always up to date as libraries for a
> specific script change, it might be easier just to distribute a
> simple executable across all nodes.
Keeping a bunch of clients up to date is as easy as a quick scripted
rsync command, or completely transparent if you have a shared /usr/local
There is some work going on to produce an R compiler, but I dont think
these are the reasons.
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