Luiz, I'm not an expert on the compilation flags, so please double check what I'm trying to say in the following.
The "CFLAGS" set for VS2008 is: /I. /DHAVE_CONFIG_H /nologo /W3 I do not know what the corresponding settings are for MinGW. It does not appear that any flag for optimization (such as /O2, /GL, etc.) is turned on for VS2008. I think that a comparison should be made between the two compilers when both have their optimization for speed settings adjusted to be as fast as possible. -Marc -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Luiz M. M. Bettoni Sent: Saturday, December 06, 2008 8:37 AM To: [email protected] Subject: RE: [Help-glpk] Re: glpk 4.34 release information Hi, Marc. This topic make me test some models with distinct builds of GLPK: http://lists.gnu.org/archive/html/help-glpk/2008-11/msg00026.html In 2 "good" machines (AMD Athlon64 2.200MHz, 2Gb DDR-400 / Intel Core 2 Duo 2x 2133 MHz, 2Gb DDR2-667), just replacing the glpsol.exe (all parameters still the same, i'm using all cuts), VS2008 build (from http://winglpk.sourceforge.net) cannot beat MinGW in all my tests. Off course, simple models are solved instantaneously, but on some of my huge problems i can see times like 80s vs 270s, for example. Maybe we can make a lot of tests and summarize it (using different machines, some different models from MIPLIB 2003) to be a "pointer" to users make a choice. Just a pointer, not "the answer to all problems". Look, maybe a transportation problem in amd processor run faster with VS2008 build, but a plan scheduling in a intel run better with MinGW build (or not?). Best Regards, Luiz Em 6/12/2008 04:11, Meketon, Marc escreveu: > Luis, > > I am curious that your MinGW execution times are so much faster than > the VS2008 times. Would you know if the various optimization > parameters are turned on for VS2008? > > -Marc >> >> I didn't use the VS2008 build 'cause it is much slower then MinGW >> build. On all my tests with several models in GMPL, the MinGW version >> take less than a half of VS2008 version time... _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk ---------------------------------------------------------------------------- This e-mail and any attachments may be confidential or legally privileged. If you received this message in error or are not the intended recipient, you should destroy the e-mail message and any attachments or copies, and you are prohibited from retaining, distributing, disclosing or using any information contained herein. Please inform us of the erroneous delivery by return e-mail. Thank you for your cooperation. ---------------------------------------------------------------------------- _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
