[Cbc-tickets] [COIN-OR Branch-and-Cut MIP Solver] #142: Problem dsbmip takes half an hour in -miplib unit test with GCC 4.4 or older

[COIN-OR Branch-and-Cut MIP Solver]

#142: Problem dsbmip takes half an hour in -miplib unit test with GCC 4.4 or
older
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Reporter:  kelman  |      Owner:  tkr
    Type:  defect  |     Status:  new
Priority:  minor   |  Component:  Cbc
 Version:  trunk   |   Keywords:
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 Mostly a heads-up, since Data/miplib3 is only getting used by Cbc/trunk
 and in !CoinAll. When compiled with GCC 4.4.x (or older, also happened for
 4.1.2), the dsbmip problem takes half an hour during `make test` where it
 only takes about 20 seconds with GCC 4.6.4 or 4.8.x. Oddly just calling
 `./cbc ../Data/miplib3/dsbmip.gz` (from installed `build/bin` folder)
 solves the problem in less than a second, but calling `./cbc -miplib`
 appears to change the options in some way that causes a very long runtime
 for this problem with older GCC versions. Might be something to look into,
 or at least make a note of.

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Ticket URL: <https://projects.coin-or.org/Cbc/ticket/142>
COIN-OR Branch-and-Cut MIP Solver <http://projects.coin-or.org/Cbc>
An LP-based branch-and-cut MIP solver.