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This is a pretty big one, but unfortunately performance only improved by about 5%.
I implemented one of the main ideas of nxopt, that is switching to the
inverse scramble on the fly if it gives a lower branching factor.
On the one hand it makes sense that it does not have such a huge impact, since
it only rarely happens that we do have a lower branching factor on inverse, but
on the other hand I am quite sad that the improvement is barely noticeable :-(
Maybe the problem is that I have introduced a lot of new overhead and I can improve
that in the future. Or maybe I am just overlooking something stupid.
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