변요한·티파니 부부됐다…“오늘 혼인신고, 결혼식은 추후에”
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.
。同城约会对此有专业解读
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，这一点在im钱包官方下载中也有详细论述
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// Finally, we release the lock on the stream