[Cbc] solving time in C++ >> time in Gams

Tue Oct 9 13:42:32 EDT 2012

Hi,
there are several things that can cause this:
different solvers version,solving is a complex task: presolve (cuting planes, heuristics, ...) and then branch and bound (cut). If you omit the first part or you do not do exactly the same steps result could be different.
Did you try to solve using CBC CLI (stand alone executable) ?
Regards

Date: Tue, 9 Oct 2012 12:16:49 +0300
From: chtsolak at gmail.com
To: cbc at list.coin-or.org
Subject: [Cbc] solving time in C++  >> time in Gams

    Hi all again,

    I have 1  question for you, if i solve it, i won't bother you again
     :-P 

    I am using cbc in order to make an executable via MS visual studio
    which solves a model.

    In order to solve it, takes 60 mins

    I have made the same problem with GAMS and solved it in 30 secs, 120
    times faster!!

    Is it because of an error in modeling or due to the different
    interface? (exe-GAMS)

    Why is there this enormous difference?

    Thank you in advance.

_______________________________________________
Cbc mailing list
Cbc at list.coin-or.org
http://list.coin-or.org/mailman/listinfo/cbc 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.coin-or.org/pipermail/cbc/attachments/20121009/ccfd7aeb/attachment.html>