WebAssembly

Web assembly, or Wasm, is a binary instruction format designed for executing in the web browser. It serves as a translator for programming languages like C, C++, and Rust, allowing them to run on web pages. All major web browsers support Web Assembly and provide an efficient alternative to Javascript for performing critical tasks. It enables creators to develop high-performance and portable web applications across different platforms. 

Wasm isn’t a programming language but a complement to Javascript. Developers can write in their preferred language, which users execute in a web browser. 

Code compiled or translated into Wasm form is a tightly packaged binary that can run on a client computer at near-native speed. This is similar to traditional assembly language, which yields some of the fastest software performance available. Low-level codes already exist in the computer’s processor and can run natively.