unsigned long long old_data_bytes = h->length * sizes[h->type];
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The wet winter of 2024 – the second wettest on record – saw the sector experience £1bn losses from damaged crops.
The algorithm maintains a running "best distance" that starts at infinity. As it walks the tree, it checks each visited point and updates the best distance if it finds something closer. Before recursing into a child node, it checks whether the closest possible point in that child's bounding box is farther than the current best. If so, the entire subtree gets pruned.