Mark Shachkov

Any progress on this one? I did a quick test changing std::set to absl::btree_set for block_pairs in SparseSchurComplementSolver::InitStorage and BlockRandomAccessSparseMatrix ctor to achieve significant speedup for InitStorage. I guess there...

I will try to find some time for that, not sure about the priority though.

https://doi.org/10.1145/3503161.3547788 might be interesting to not to rely on feature orientation.