Hello, everyone! I guess no one is still using R on Sun Sparc these days. But our department has a (pretty new) two-CPU Sun server. We recently compiled R as a 64 bit application and expected a performance boost. But it runs 25-30% slower than the 32 bit version of R. Anyone knows why this is so? Thanks! Jason ====Jason Liao, http://www.geocities.com/jg_liao Dept. of Biostatistics, http://www2.umdnj.edu/bmtrxweb University of Medicine and Dentistry of New Jersey phone 732-235-5429, School of Public Health office phone 732-235-8611, Cancer Institute of New Jersey office moble phone 908-720-4205 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html [[alternative HTML version deleted]]
Roger D. Peng
2004-Sep-08 02:44 UTC
[R] 64 bit R slower than 32 bit R on Sun Sparc Solaris?
Are you using an optimized BLAS for both builds? That's one possibility. Also, 64-bit builds use up more memory initially since the pointers are bigger. I've tried both 64-bit and 32-bit builds on Sparc/Solaris and haven't seen any slowdown. -roger Jason Liao wrote:> Hello, everyone! I guess no one is still using R on Sun Sparc these > days. But our department has a (pretty new) two-CPU Sun server. We > recently compiled R as a 64 bit application and expected a performance > boost. But it runs 25-30% slower than the 32 bit version of R. Anyone > knows why this is so? Thanks! > > Jason > > > ====> Jason Liao, http://www.geocities.com/jg_liao > Dept. of Biostatistics, http://www2.umdnj.edu/bmtrxweb > University of Medicine and Dentistry of New Jersey > phone 732-235-5429, School of Public Health office > phone 732-235-8611, Cancer Institute of New Jersey office > moble phone 908-720-4205 > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >