Is this a SPARC system? On at least some SPARC systems, the "long double" type in C is implemented very slowly in software, and it seems that it is used for the sums done when calculating standard deviations with "sd".
Radford Neal > Date: Wed, 8 Aug 2012 18:55:37 -0500 > From: "Eberle, Anthony" <ae...@allstate.com> > To: <r-devel@r-project.org> > Subject: [Rd] Performance issues with R2.15.1 built from source on > Solaris? > I have a question about building R (2.15.1) from source on a Solaris 10 > 64bit virtual server with 2 cores and 16GB memory that is running on an > Oracle T4 server. Based on several tests I have done this configuration > has been several orders of magnitude slower than any other configuration > I've tested. > > A simple test of some code to calculate the standard deviation 10000 > times (simple code to consume resources) takes on average 121.498 > seconds on the Solaris server where the next worst system (Redhat Linux) > takes 1.567 seconds: ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
