random_tree() is a linear time and space C++ implementation able to create trees of up to a billion nodes for genetic programming and genetic improvement experiments. A 3.60GHz CPU can generate more than 18 million random nodes for GP program trees per second.

中文翻译：

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快速生成大随机二叉树

random_tree() 是一种线性时间和空间 C++ 实现，能够为遗传编程和遗传改良实验创建多达十亿个节点的树。一个3.60GHz的CPU每秒可以为GP程序树生成超过1800万个随机节点。