[R-SIG-Mac] BLAS benchmarks on R 2.12.0

[Michael Spiegel]

Thank you, I can run off and do some more tests with this information.
 I think the culprit on my development machine is that Xcode needs to
be upgraded and then I can use -mtune=core2.  I have one small
follow-up question.  I thought the compilation flags for building
src/extra/blas had changed from version 2.12.0 to 2.11.1.  But you
suggest maybe they haven't changed?

On Wed, Nov 3, 2010 at 6:31 AM, Simon Urbanek
<simon.urbanek at r-project.org> wrote:
>
> The current build flags for i386 are listed in
> https://svn.r-project.org/R-dev-web/trunk/QA/Simon/R-build/conf.leopard-i386
>
> They did not change recently so they were the same for 2.11.1. The compiler used is gcc-4.2 from Xcode 3.1.4 (R is built on OS X 10.5.8) with the corresponding Fortran form the tools page.
>

> To get back to your problem - did you try the single threaded ATLAS for your problem?

I did try ATLAS and did not see performance improvements.  But that
attempt was without -mtune=core2.