Obtaining solver timings from Pyomo

Question

I would like to seek some advice on the following:

I am currently using Pyomo to generate my MILP model in Pyomo and solve it using Gurobi, respectively.

As the solution process is iterative, I would like to enquire on how to obtain the following timings for each iteration:

1. the time to build the Pyomo model
2. the time to translate the Pyomo model into the format used by the solver
3. the time spent inside the solver, i.e., the solution time
4. the time spent loading the solver solution back into Pyomo.

Thank you!

Answer 1

For timing within the gurobi solver, maybe you can call <optimizer>.solve() method with report_timing=True, as described in pyomo's documentation at https://pyomo.readthedocs.io/en/stable/library_reference/solvers/gurobi_persistent.html

I haven't used Gurobi before. If gurboipy logs the starting and ending time of the optimization, then you can manually time the start and end of your whole program. That would give you 4 and 1 + 2.

I think importing python library is slow. You can exclude the time for importing libraries.

I don't know how to split 1 and 2 at the moment.