使用内存作cache时，需要对值进行深度拷贝
使用内存作cache时，需要对值进行深度拷贝

74sharlock/thinkjs,thinkjs/thinkjs,akira-cn/thinkjs,74sharlock/thinkjs,75team/thinkjs,akira-cn/thinkjs,akira-cn/thinkjs,maxzhang/thinkjs,75team/thinkjs,maxzhang/thinkjs,maxzhang/thinkjs,75team/thinkjs,snadn/thinkjs,Qihoo360/thinkjs,lukw00/thinkjs,lukw00/thinkjs