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Use ordered set to track declared macros, avoid double-declarations #807

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marcoeilers
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Comment on lines +429 to +432
for (m <- macros) {
if (!_declaredFreshMacros.contains(m))
prover.declare(m)
}
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I am bit afraid that using InsertionOrderedSet may hurt performance quite a lot. From what I gathered, this data structure is very inneficient and this may hurt us if the lists are very big.

I wonder if we really are making use of the fact that _declaredFreshMacros only stores once each value. If that is not necessary, could we keep the implementation using a vector and keep this check? ((!_declaredFreshMacros.contains(m)))

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I'm not sure the Vectors will do much better; checking many times if a vector contains a specific value isn't going to be efficient either, right. We just need a good InsertionOrderedSet implementation. But I made a PR for now to just add perform the check.

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