asm.js is a subset of JavaScript designed to allow computer software written in languages such as C to be run as web applications while maintaining performance characteristics considerably better than standard JavaScript, which is the typical language used for such applications.

asm.js. an extraordinarily optimizable, low-level subset of JavaScript. specification (work in progress) frequently asked questions.

Aug 18, 2014 · This specification defines asm.js, a strict subset of JavaScript that can be used as a low-level, efficient target language for compilers. This sublanguage effectively describes a sandboxed virtual machine for memory-unsafe languages like C or C++.

The principal benefit of asm.js over whole new technologies like NaCl and PNaCl is that it works today: existing JavaScript engines already optimize this style of code quite well. This means that developers can ship asm.js today and it'll simply get faster over time.

这个编译器可以将 C / C++ 代码编译成 JS 代码，但不是普通的 JS，而是一种叫做 asm.js 的 JavaScript 变体。 本文就将介绍 asm.js 和 Emscripten 的基本用法，介绍如何将 C / C++ 转成 JS。

Jul 19, 2015 · asm.js is regular javascript code, and is compiled into bytecode by the JS interpreter as always. However, an interpreter with asm support is supposed to do ahead-of-time compilation, and possibly to generate more efficient code representation because of …

Asm.js, short for Assembly JavaScript, is a subset of JavaScript. An asm.js program will behave identically whether it is run in an existing JavaScript engine or an ahead-of-time (AOT) compiling engine that recognizes and optimizes asm.js—except for speed, of course!