of allocations to 1, you reduced the number of allocations to 0!
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The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.
Radio 5 Live,·18 Feb 2026,·49 mins。关于这个话题，safew官方版本下载提供了深入分析
Tony Jolliffe BBC，推荐阅读safew官方版本下载获取更多信息
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