Hi Emma, > In this case, the default branching works better than pseudocost branching. > However, in general the original problem is much slower than the previous one > (lp_modified.txt by removing x[0.0])
In general, pseudocost branching is considered more accurate, but needs more time for initialisation. However there is no guarantee that this holds for any problem. Moreover, I see that your problem is not very well scaled (although a lot better than with big M): A: min|aij| = 1.307e-009 max|aij| = 7.569e+005 ratio = 5.792e+014 Can you change the formulation to reduce the range of values in the constraints? Best Regards, Chris Matrakidis _______________________________________________ Bug-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-glpk
