Explore asm.js, a JavaScript subset designed to boost web performance and enable near-native speed for browser-based applications and games.
Run fast, high-performance code in your browser
asm.js is a specialized JavaScript subset that helps web developers write code that runs much faster in browsers. It’s designed for projects that need performance close to native applications, like games or complex tools, all running right in your browser without extra plugins.
On this site, you can find the official specification, answers to common questions, and resources to understand how asm.js works. Whether you’re a developer aiming to speed up your web apps or just curious about how browsers execute high-performance code, asm.js provides the technical details and community support you need.
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