for t := range c {
The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.
，推荐阅读夫子获取更多信息
highWaterMark: 10,，这一点在雷电模拟器官方版本下载中也有详细论述
doubling-allocation once the stack-allocated buffer overflows.
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