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PrePasses setting doesn't seem to have an effect?

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1 comment

  • Matthias Miltenberger
    Gurobi Staff Gurobi Staff

    Hi Sebastian,

    The parameter PrePasses actually limits the maximum number of passes through all the different presolving routines. It can still happen that there is a specific presolving routine that takes a lot of time.

    Gurobi tries to print a new line every 5 seconds - this does not relate to the actual passes through the presolving phase.

    Usually, the time invested in presolving pays off in a much faster-to-solve problem for the often more time-consuming branch-and-cut process.

    Did you try disabling Presolving altogether (Presolve=0) to see how the overall performance is affected?




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