说明：  按照ASM（汇编）的效率来执行JS。其实“asm.js是由Mozilla提出的一个基于JS的语法标准，主要是为了解决JS引擎的执行效率问题，尤其是使用Emscripten从C/C++语言编译成JS的程序的效率，”。从理论上讲，只要按照ASM.js规范的要求来写JS，其运行的时候底层代码引擎就会将JS编译成本地代码执行，从而大大提高执行效率。
(Execute JS according to the efficiency of ASM (assembly). In fact, "asm.js is a JS based Syntax Standard proposed by Mozilla, mainly to solve the efficiency problem of the execution of JS engines, especially the efficiency of using Emscripten to compile JS from C/C++ language." In theory, as long as JS is written in accordance with the requirements of the ASM.js specification, the underlying code engine will compile the JS into local code when it runs, which greatly improves execution efficiency.)