[R-SIG-Mac] How to Speed up R on the G5

[Martin Maechler]

Just one general note -- complementing all the
knowledgable and specific replies you already got :

This is a statement in much generality:

If you build (configure ; make ..) your own version of R,
please do run "make check" (at least; there's more checks you
can run).

If that gives errors (or warnings that look peculiar), do
investigate, and possibly ask for advice on R-devel (or a more
specialized list R-SIG-Mac).

Do *not* be happy if your newly compiled version of R runs a
faster but doesn't pass "make check". 
	----------------------------------------------------
Rather, DO NOT USE SUCH A VERSION OF R for anything "real" !
	----------------------------------------------------
(unless you are very sure that the reasons for failing "make
 check" won't be a problem -- and do note that I think it's only
 rarely possible to be honestly sure here!)

Martin Maechler, ETH Zurich
(speaking for myself officially, but still as member of the R-core team)