Gabriel Hackebeil comments

Results 18 comments of


                                            Gabriel Hackebeil

With cplex, solver_io='python' is much slower than solver_io='nl' or default

Wow! Thanks for the example! We shall have a look.

With cplex, solver_io='python' is much slower than solver_io='nl' or default

Here is some relevant profiling: ``` Ordered by: internal time, cumulative time ncalls tottime percall cumtime percall filename:lineno(function) 1 47.189 47.189 48.069 48.069 {cplex._internal.py1013_cplex1260.Pylolmat_to_CHBmat} 100001 23.235 0.000 23.235 0.000 {cplex._internal.py1013_cplex1260.CPXXgetcolindex}...

Incorrect behavior with the relax_integrality solver option

Yes. From CPLEX.py: ```python if 'relax_integrality' in self.options: script += 'change problem lp\n' ```

Using relational Expression in Objective

I agree that the is_relational check probably needs to go into the writers either way. However, why not just disallow storing relational expressions in the Expression object as well? It...

Using relational Expression in Objective

That's a good catch. I believe Objective is a subclass of Expression though, so disallowing it there would also cover this second case. Since this works with the NL writer...

Using relational Expression in Objective

@jsiirola: Are you in favor of at least temporarily disallowing it until someone actually adds this kind of functionality? I imagine the difference will be 1-2 lines of code in...

Baron does not work with the Pyro solver manager

This one took me some time to figure out. Here is the issue: The baron solver, as far as I am aware, does not accept command line options. When we...

Baron does not work with the Pyro solver manager

I think it's probably good to keep around until someone starts on the solver base class re-implementation.

del_component issue when deleting constraints

Is there really a need to add implicit sets the model? I understand why they are being created, but couldn't they just be kept alive by the objects that reference...

Seeing a lot of "cannot find thread state, sample will be thrown away" warning messages

I'm seeing this as well with Python 2.7.13 built from source on a Linux machine. I'm using vmprof master (7dba52895e85eb860032f212239a220912f8465f) installed using pip. I've determined that these warnings appear solely...