https://blog.wongcw.com/2019/03/17/facebook%e4%b9%9f%e5%8f%83%e8%88%87%e4%ba%86%e8%8b%b1%e7%89%b9%e7%88%becooper-lake-cpu%e7%9a%84%e7%a0%94%e7%99%bc%e9%81%8e%e7%a8%8b/