However, I don't think we need to worry about this here. While Swift's hash seed is currently global, I plan to switch to per-instance or per-capacity seeds soon. Either of those would perturb element ordering, eliminating the quadratic behavior.However, I don't think we need to worry about this here. While Swift's hash seed is currently global, I plan to switch to per-instance or per-capacity seeds soon. Either of those would perturb element ordering, eliminating the quadratic behavior.