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Richard M. Stallman authored
total_length calculation. Minimize pointer dereferencing. (balance_an_interval): Remove recursive rebalancing. Rebalance precisely when imbalanced. If a rotation is done, rebalance only the node which may have become unbalanced. Iterate until the current node is balanced. (balance_possible_root_interval): New function. (balance_intervals): Move the interation into rebalance_an_interval. (balance_intervals_internal): New subroutine of balance_intervals. (split_interval_right, split_interval_left): Speed up by not checking LEAF_INTERVAL_P. (split_interval_right, split_interval_left, find_interval, adjust_intervals_for_insertion, graft_intervals_into_buffer): Add dynamic rebalancing anywhere a node may become unbalanced. (graft_intervals_into_buffer, copy_intervals): No longer any need to do a full rebalance as the tree stays balanced.
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