getTimer()使用Date.now()返回值，提高性能。
getTimer()使用Date.now()返回值，提高性能。

jiangzhonghui/egret-core,SmallAiTT/egret-core,unsilence/egret-core,unsilence/egret-core,wl3780/egret-core,jarvys/egret-hacking,jiangzhonghui/egret-core,wisdomsword/egret-core,wl3780/egret-core,wisdomsword/egret-core,Lanfei/egret-core,SamuelGavin/egret-core,SamuelGavin/egret-core,SmallAiTT/egret-core,Lanfei/egret-core,jarvys/egret-hacking