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Re: [Help-glpk] Patch for pseudocost branching with product score


From: Chris Matrakidis
Subject: Re: [Help-glpk] Patch for pseudocost branching with product score
Date: Wed, 18 Jan 2017 16:50:10 +0200

Hi Andrew,

> At first I'd like to finish the dual simplex routines (including your
> patch from May 2016), and then inspect and implement your improvements
> related to the mip solver.

This patch is orthogonal to any changes in the simplex solver, and
shouldn't affect the default behaviour. So, if you are worried that it
will be hard to evaluate the changes to the simplex solver between the
releases, I think it is safe.


> BTW, how did you implement bfd_copy? I missed that.

I'm re-sending the relevant patch, which adds a copy operation in each
factorisation driver and the bfd_copy function that uses them. The
copy operations reuse existing allocations in the destination when
possible.


Best Regards,

Chris Matrakidis

Attachment: pcost2.patch
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