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.
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并发数QPS平均响应时间备注100290350ms差不多200570360ms翻倍！5001400370ms稳定上升10002800380ms直接起飞！20003100750ms响应时间开始涨，QPS稳定，更多细节参见爱思助手下载最新版本
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