Rough investigation: Open-source solver time and memory penalties

[Olexandr]

Thanks @willcattoneeca, feels great to see that speed up!
Thanks @Annti-L! Testing with larger models, sounds great. I will make adjustments to enable specifying a filepath as input.
Do you have any suggestions for an efficient way of checking the correctness of a generated model? I've been mainly using the value of objective function and randomly checking some of the generated equations so far.