WebAssembly is a project to create a new bytecode (a machine-readable instruction set that’s quicker for browsers to load than high-level languages) that’s more efficient for both desktop and mobile browsers to parse than the full source code of a Web page or app.

Browsers currently use JavaScript to interpret code and enable functionality on websites such as forms and dynamic content. Improvements have been made to load times via asm.js, but bytecode-based systems like .NET are faster.

Web Assembly will provide a standardized way to compile Web apps before they run to speed their performance

Proposed as a standard that could one day be implemented in all browsers, WebAssembly could bring app-like performance to Web content and apps.

Until WebAssembly becomes more widely available, the coalition of developers plan to bridge the gap with a JS script that will convert wasm to Mozilla’s widely supported asm.js for browsers that don’t support the new format yet.

WebAssembly is still very much in its early days: neither its specifications nor its high level design have been finalized yet. However, with major browser developers behind the project, it should see the light of day soon enough.

The Next Web