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.
bearwithcameraпользователь Reddit
，这一点在体育直播中也有详细论述
free_table[bucket] = h;
"It's incredibly energy-intensive and the birds use up to 50% of their body mass," he says.