https://github.com/Microsoft/LightGBM

    https://lightgbm.readthedocs.io/en/latest/index.html

    https://papers.nips.cc/paper/6907-lightgbm-a-highly-efficient-gradient-boosting-decision-tree.pdf

    https://www.msra.cn/zh-cn/news/features/lightgbm-20170105

    https://zhuanlan.zhihu.com/p/38516467

    https://zhuanlan.zhihu.com/p/25308051

    https://zhuanlan.zhihu.com/p/35645973

    https://zhuanlan.zhihu.com/p/73045333

    https://zhuanlan.zhihu.com/p/34698733

    关于cache：https://blog.csdn.net/hellojoy/article/details/54744231