While we're on the subject, I ran a few tests on several of our platforms
here and although I don't claim that these are very sophisticated
(or even general), I did find some results that were interesting to me
(in determining my computing platform). This is my summary:
(1) Matrix operation benchmark on a Sun Sparc 20:
R : 69 seconds
S+: 43 seconds
(2) Looping benchmark doing lots of flops (same machine):
R : 6 seconds
S+: 24 seconds
(3) Matrix operation benchmark on Pentium II - 400 running NT:
R : 30 seconds
(4) Matrix operation benchmark on Pentium II - 400 running Linux:
R : 11 seconds
I can't afford Splus on my PC so I can only compare R across OS's ,
but that was sufficiently useful for my purposes. I found it interesting
that the performance was so different between NT and Linux, but I suspect
it has something to do with the preferred development platform.
The matrix operation benchmark basically involved generating
a huge matrix of random numbers, doing X'X and inverting that,
(and maybe something else, I forget). The looping benchmark
did a small number of muliplications 10000 times or something.
I also did an I/O benchmark where S+ was 20 or 30% faster by
my recollection, but I think this was flawed.
J. Andy Royle, U.S. Fish and Wildlife Service -----------------------
Adaptive Management and Assessment Team : 11510 American Holly Drive,
Laurel, MD 20708-4017. phone - 301-497-5673 : fax - 301-497-5706
email- jar at oriole.er.usgs.gov or andy_royle at fws.gov -----------------
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