[Cbc] Constraints order

[John Forrest]

Yves,

Fix is in Cgl/stable/0.58 so if you are using svn just update.  I don't 
know when next release will be.  As it only one file that has been 
changed you could also just download it from

https://projects.coin-or.org/Cgl/browser/stable/0.58/Cgl/src/CglProbing/CglProbing.cpp

The change you suggest would improve solution times by a tiny tiny 
amount - but it normally is best to keep your code as simple (and 
therefore bug free) as possible.

John Forrest

On 20/12/13 11:17, Yves Touchard wrote:
> John,
>
> Thank you very much for quick and efficient reply!
> I have just a couple of questions.
>
> First, do you know when this fix will be released?
>
> Then, i am wondering if doing a constant propagation could help the 
> solver.
> My constraints file is generated by a piece of code which do not try 
> to optimize them.
> For instance, the following sequence:
> _C0: var_0 = 0
> _C1: var_0 + var_2 >= var_3
>
> could be replaced with:
> _c0: var_2 >= var_3
>
> Yves

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