Hi,
Gecode has several propagators with variants where an argument can be an
IntVar or IntVal. In general, is there a (significant) performance
advantage in using the IntVal version instead of having an IntVar with a
singleton domain, if the argument has a known integer value when posting
the propagator? Can a generalisation even be made, or will this depend
on the specific propagator?
The reason I ask is that since I am writing an interface to gecode, I do
not know how the user will call specific propagators, and it is much
cleaner for me to write the code to call as few version of the
propagators as possible, instead of trying to specialise for every
variant of the propagator (IntVal or IntVar), especially if there are
more than one argument like this, but if this seriously affect
performance, then I guess it is unavoidable.
Thanks and cheers,
Kish
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