Lesson 2.3:
Rust & Wasm In Node.js

Beyond JavaScript Limits

For computationally intensive tasks like cryptography or image processing, JavaScript might not be enough. 2026 developers use WebAssembly (Wasm) to run near-native code.

Rust + Wasm-Bindgen

Rust is the primary language for Node.js Wasm modules due to its memory safety and high-level abstractions.

// Rust logic
#[wasm_bindgen]
pub fn fast_crunch(data: &[u8]) -> Vec {
    // High-speed processing
}

Loading Wasm in Node.js

Modern Node.js allows for seamless ESM loading of Wasm modules.

import { fast_crunch } from './pkg/crunch_bg.wasm';

const result = fast_crunch(myData);

Check Your Knowledge

Which language is most recommended for high-performance Node.js Wasm modules?

• Rust
• Python