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Hello,<br>
<br>
I just passed to the new version of SCIP and tried to make a couple
of tests, the new version seems to be significantly slower compared
to the 3.0.1. <br>
<br>
I am using Cplex as the lp solver, and I had to compile with the
tags ZIMP=false READLINE=false ZLIB=false GMP=false (exactly as the
previous version, except for GMP).<br>
<br>
I have a Branch-and-Price code, with quite a few more features
(pricer, branching rule, heuristics, cuts). To make my code working
I just needed to change the functions SCIP_DECL_PRICERREDCOST() and
SCIPaddCut() adding the new parameters. All the rest is exactly the
same. The number of nodes and columns generated is much bigger, and
the dual bound is converging very slowly. The time goes from less
than a second to some few hundred seconds.<br>
<br>
Do you have any insight of this behaviour? or anything in particular
I should check that is behaving differently in the new version?<br>
<br>
Thanks in advance!<br>
<br>
best,<br>
<br>
Alessia<br>
<br>
<br>
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<pre class="moz-signature" cols="72">--
Alessia Violin
Service Graphes et Optimisation Mathématique (G.O.M.)
Université Libre de Bruxelles
C.P. 210/01
Boulevard du Triomphe
B-1050 BRUXELLES
Tel: 02 650 58 80 - Fax: 02 650 59 70
Email: <a class="moz-txt-link-abbreviated" href="mailto:aviolin@ulb.ac.be">aviolin@ulb.ac.be</a>
Webpage: <a class="moz-txt-link-freetext" href="http://homepages.ulb.ac.be/~aviolin/">http://homepages.ulb.ac.be/~aviolin/</a></pre>
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