Hello Luiz, >> And, like Andrew in VS2008, i didn't see performance difference between >> GCC -O2 and -O3, but a lot of warnings for using the -O3 flag can be >>found on the web. So, in MinGW/GCC builds may be a good idea mantain a >>good and safe "-O2" cflag.
I have compiled on 32 and 64bit Windows. /O2 gives a solution time saving > 50 % for examples/tsp.mod /GL gives an additional saving of 2 % for examples/tsp.mod >> When Xypron release an "/O2" version of winglpk i'll make some >> benchmarks again. I have uploaded gspsol and the dll compiled with /O2 /GL on http://winglpk.sourceforge.net as glpk-4.34 rev1 My solution times on an Athlon 64 3000+ are for examples/tsp.mod: Visual Studio Net 2003 32 bit: 11.6 seconds MinGW with /O2: 6.7 seconds Visual Studio Net 2003 32 bit with /O2 /GL: 5.2 seconds Visual Studio Express 2008 64 bit with /O2 /GL: 4.0 seconds >> Xypron, the excel connection was a valid ODBC connection test? Can we >> say that ODBC support in GLPK MinGW/GCC build is OK? I compiled with the config_MinGW and Build_GLPK_with_MinGW.bat kindly provided by you. examples/sql/sudoku_odbc.mod and examples/sql/transp_odbc.mod perform correctly. Best regards Xypron -- View this message in context: http://www.nabble.com/glpk-4.34-release-information-tp20832550p20903554.html Sent from the Gnu - GLPK - Help mailing list archive at Nabble.com. _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
