Summary of omc scaling issues

[Francesco Casella]

This ticket collects all the known issues with omc scaling poorly with the model size:

• #3695 removeSimpleEquations is slow on large models
• #3781 Fix scaling of detectJacobianSparsePattern
• #3816 Matching and sorting scales as O(N³) in models with large numbers of discrete variables
• #3905 findZeroCrossings scales as O(N²)
• #4005 EncapsulateWhenConditions scales as O(N³) in models where a when clause is triggered by a large vector of conditions
• #4006 Weird performance of SimCode in models with many when clauses and events
• #4388 collectInitialBindings scales as O(N³)
• #4398 comSubExp scales as O(N³)
• #4460 resolveLoops scales as O(N³)