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<div class="moz-cite-prefix">Karl,<br>
<br>
After a quick look at the three models, it looks to me as if you
want to make preprocessing more lightweight. Also for the two
models with zero objective function, the feasibility pump
heuristic takes time and does not help (I don't know whether that
is true for other zero objective models).<br>
<br>
I attach log files using stable/2.8 - 4.lp 12.5 seconds, 21.lp 4.4
and 50.lp 1.96. Given the sizes the times look reasonable.<br>
<br>
I presume the 300 cases have to be solved sequentially so 420
seconds looks tight - if can be done in parallel then easy.<br>
<br>
John Forrest<br>
On 08/05/14 13:39, Karl St-Cyr wrote:<br>
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<blockquote
cite="mid:CAG2u=01B9B5QdvDRpZxqhDHRU2cK6EsFAtMiH8Oqk9NyhNzF_Q@mail.gmail.com"
type="cite">
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<p style="margin-bottom:0cm">Hi,</p>
<p style="margin-bottom:0cm">I'm trying to use CBC to solve my
linear problem. After implementing a version of BigM I
manage to find a better solution but the time to solve it is
a bit too high for my needs. This is my first time using CBC
and I want to make sure I'm not doing something wrong or
missing a way to speed it up.</p>
<p style="margin-bottom:0cm">You'll find 3 dump examples I
have problems with in the link bellow (take note that 1
problem can be composed of 300+ of theses dumps and would
need to execute all of them in more or less 7 min, some of
the dumps are also taking close to no time).</p>
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<div dir="ltr" style=""><font face="arial, sans-serif"><a
moz-do-not-send="true"
href="https://www.dropbox.com/sh/dff6h98qxhf7svy/AAC60y10SORx3b25P7bT2bAOa">https://www.dropbox.com/sh/dff6h98qxhf7svy/AAC60y10SORx3b25P7bT2bAOa</a></font><br>
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<div dir="ltr" style=""><font face="arial, sans-serif"><br>
</font></div>
<div style=""><font face="arial, sans-serif">Thank you for
your help</font></div>
<div style=""><font face="arial, sans-serif">Karl</font></div>
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<br>
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