[Symphony-tickets] [SYMPHONY] #132: Performance issue: lp solve CPLEX vs Clp

[SYMPHONY]

#132: Performance issue: lp solve CPLEX vs Clp
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 Reporter:  anh509       |      Owner:  tkr
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:
Component:  Not Sure     |    Version:  trunk (SVN)
 Keywords:               |
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 The attached file is solved with Clp in trunk with a few seconds. The
 option file contains

 do_primal_heuristic 0
 prep_level 0

 The options used to build are

 ../configure --enable-debug --enable-sensitivity-analysis --enable-tests

 When CPLEX used as the lp solver, however, the solver solves many more LPs
 in the nodes and takes longer. The solution to the initial LP are the same
 but the branching variables differ. The number of violated cuts are
 different at the first LP iteration. The problem persists with or without
 cgl cuts. The CPLEX one is built with

 ./configure --enable-debug --enable-sensitivity-analysis --with-cplex-
 lib=-L/usr/local/CPLEX_Studio_125/cplex/lib/x86-64_sles10_4.1/static_pic/
 -lcplex -lpthread -lm --with-cplex-
 incdir=/usr/local/CPLEX_Studio_125/cplex/include/ilcplex --with-lp-
 solver=cplex

 The

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Ticket URL: <https://projects.coin-or.org/SYMPHONY/ticket/132>
SYMPHONY <http://projects.coin-or.org/SYMPHONY>
The SYMPHONY framework for parallel branch-and-cut algorithms.