Reduce object creation during solving

[jgFages]

Would you say more generally that one should avoid :

• declaring lambda on the fly ?
• using streams ? when the calls are used at each node?

[cprudhom]

Using stream during the resolution should be carefully done. If an alternative exists without stream, it should be preferred. Note, that it could require the introduction of new method (like I did with Variable.forEachPropagator).

Using lambdas is more or less the same. If predefined functions/consumers/... can be extracted, that's better: profiling is easier and it limits the creation of objects (but it might increase the size of a model...). Using lambda to save IOperation is OK, though, because a new instance is necessary.

[jgFages]

Thanks. It confirms my experience of streams within algorithms.