On 04/26/2013 07:50 AM, Adam Seering wrote:
Hi,
I've been playing around with the R source code a little; mostly just
trying to familiarize myself. I have access to some computers on a reservation
system; so I've been reserving a computer, downloading and compiling R, and
going from there.
I'm finding that R takes a long time to build, though. (Well, ok, maybe 5
minutes -- I'm impatient :-) ) Most of that time, it's sitting there
byte-compiling some internal package or another, which uses just one CPU core so
leaves the system mostly idle.
I'm just curious if anyone has thought about parallelizing that process?
Hi Adam -- parallel builds are supported by adding the '-j' flag when you invoke
make
make -j
The packages are being built in parallel, in as much as this is possible by
their dependency structure. Also, you can configure without byte compilation,
see ~/src/R-devel/configure --help to make this part of the build go more
quickly. And after an initial build subsets of R, e.g., just the 'main' source
or a single package like 'stats', can be built with (assuming R's source, e.g.,
from svn, is in ~/src/R-devel, and you're building R in ~/bin/R-devel) with
cd ~/bin/R-devel/src/main
make -j
cd ~/bin/R-devel/src/library/stats
make -j
The definitive source for answers to questions like these is
> RShowDoc("R-admin")
Martin
Thanks,
Adam
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