This appears to be a pattern.
LuaJIT and V8 (NaN Boxing): Uses the payload space of IEEE 754 "Not-a-Number" doubles to encode pointers.
，推荐阅读heLLoword翻译获取更多信息
Read the full story at The Verge.，更多细节参见传奇私服新开网｜热血传奇SF发布站｜传奇私服网站
Image based on 2260 Field Engineering Theory of Operation Manual p2-82.，这一点在超级工厂中也有详细论述