September 2018
Intermediate to advanced
328 pages
9h 10m
English
Content preview from Learn WebAssembly
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Mozilla and asm.js
Mozilla debuted asm.js in 2013 and provided a way for developers to translate their C and C++ source code to JavaScript. The official specification for asm.js defines it as a strict subset of JavaScript that can be used as a low-level, efficient target language for compilers. It's still valid JavaScript, but the language features are limited to those that are amenable to ahead-of-time (AOT) optimization. AOT is a technique that the browser's JavaScript engine uses to execute code more efficiently by compiling it down to native machine code. asm.js achieves these performance gains by having 100% type consistency and manual memory management.
Using a tool such as Emscripten, C/C++ code can be transpiled down to asm.js and ...
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