#12004: copying a linear program using Coin solver consumes enormous amounts of
memory
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Reporter: john_perry | Owner: ncohen
Type: defect | Status: new
Priority: major | Milestone: sage-4.8
Component: linear programming | Keywords: linear programming, Coin,
copy, memory
Work_issues: | Upstream: N/A
Reviewer: | Author: john_perry
Merged: | Dependencies:
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Comment(by john_perry):
Here's what I tried. In `coin_backend.copy` I changed line 990,
{{{
p.si = new c_OsiCbcSolverInterface(<OsiSolverInterface *> self.si)
}}}
to
{{{
for each in xrange(20): p.si = new
c_OsiCbcSolverInterface(<OsiSolverInterface *> self.si)
}}}
That gave me no problems.
Then I changed it to two lines:
{{{
p.si = new c_OsiCbcSolverInterface(<OsiSolverInterface *> self.si)
for each in xrange(20): p.si = new
c_OsiCbcSolverInterface(<OsiSolverInterface *> p.si)
}}}
and quickly regretted it!
So, it looks as if that's the problem.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12004#comment:14>
Sage <http://www.sagemath.org>
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