more of a niche case, but i once achieved easy concurrent writes to an rbtree by converting it into a bunch of rbtrees hanging off a two-level trie. the point w

more of a niche case, but i once achieved easy concurrent writes to an rbtree by converting it into a bunch of rbtrees hanging off a two-level trie. the point was that you only need to lock the subtree you're actually editing, because since tries are never rebalanced, edits cannot propagate upwards.