> I am suffering from the same problem. I have tried all the following but > none works. > [...] > My problem size is > Rows: 711 > Columns: 189 (189 integer, 189 binary) > And the solution time is 270s which is too slow for me because I need to > call it many times in my code.
Why do you need to solve the mip many times? Is it a subproblem? Do you really need optimal solution, or a suboptimal solution would be sufficient to you? > What else can I do to speed it up? Could you write your instance in in mps or cplex lp format, gzip it, and post it to me? > Do I > need to study the branch and cut API routines? Is it possible to provide > an initial solution in the current version? Yes. > Will it speed up the program? In principle, yes. > Is it possible to bound the object function as mentioned in the original > post? Yes, however, it is better to use glp_ios_heur_sol. Andrew Makhorin _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
