Thanks for your response. I found the folder to modify the compiler for C source codes. C++ 6.0 is an old C programming environment (1994~1998) but it is efficient. When compiling C source codes in C programming environment, one needs to choose between "debug" or "release" modes. "release" mode is much faster than "debug" mode. But in R's "R CMD SHLIB", I did not see such an option.
I want to try alternative compilers to see if I can reach that level of efficiency in R's DLL. Later, I may try using "OPENMP" in my C codes to do parallel computing. So I need to figure out how to change compiler to generate DLL for R. Could you give me some suggestions? Thanks a lot! -- View this message in context: http://n4.nabble.com/Efficiency-of-C-Compiler-in-R-CMD-SHLIB-tp1934429p1934485.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.