Thank you very much for your kind explanation. I did find my DLL compiled using either VC++ 6.0 or Intel Compiler (almost equally fast) is significanlty faster than that compiled using gcc (55 seconds vs. 78 seconds), the default compiler in R. I did not choose "debug" mode when using gcc so I suppose it generates "released" version of DLL. I just wonder how to switch to using ICC or VC++ 6.0' compiler in "R CMD SHLIB". Could you give me some advice? Thanks! -- View this message in context: http://n4.nabble.com/Efficiency-of-C-Compiler-in-R-CMD-SHLIB-tp1934429p2004312.html Sent from the R help mailing list archive at Nabble.com.
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