Understand The Power of WebAssembly

Imagine running desktop-class applications directly in your browser without installing anything. Think about online tools like Adobe Photoshop, Figma, and even modern 3D games running smoothly on the web.

A few years ago, this level of performance inside the browser was nearly impossible. But since the official release of WebAssembly (WASM) in 2017, browsers have been able to run high-performance applications with near-native speed.

Interestingly, WebAssembly is not a programming language. Instead, it is a compilation target for high-level languages such as C, C++, Rust, and Java.

Take Figma as an example. Its web application interface is built with HTML, CSS, and JavaScript. But the rendering engine — the part responsible for drawing graphics efficiently — was not written in JavaScript. It was written in C/C++ and then compiled into WebAssembly.

The generated WASM file can then be loaded into the browser through JavaScript, allowing the application to achieve near-native performance. This works because WebAssembly is a low-level bytecode format optimized for fast execution inside a secure browser runtime.

So whenever you need to build features that demand heavy computation — such as video editing, image processing, simulations, CAD software, games, or machine learning — and JavaScript alone becomes inefficient, you can write that performance-critical logic in languages like C++, Rust, or Java and compile it to WebAssembly. Check here (https://developer.mozilla.org/en-US/docs/WebAssembly/Guides/C_to_Wasm)

This gives you the power of native performance while still running entirely in the browser.

Thanks for reading.