three.wasm

"The future of Three.js is WebAssembly" — @threejs

After years of pushing JavaScript to its limits, we've decided to rewrite three.js entirely in WebAssembly. The result? three.wasm — a 10KB binary that renders 3D graphics at 480+ fps.

No more garbage collection pauses. No more JIT warm-up. No more "use strict". Just raw, uncompromising performance.

Getting Started

<script>
const { instance } = await WebAssembly.instantiateStreaming(
    fetch( 'three.wasm' ), { env: { abort: () => {} } }
);

instance.exports.init();
instance.exports.update( time, aspect );
</script>

Features

• 10KB total. Down from 175KB. You're welcome.
• No dependencies. Not even JavaScript.
• 480+ fps on a spinning cube. Imagine what it could do with two.
• Matrix math computed at native speed.
• WebGL2 rendering pipeline.

FAQ

Q: Is this real?

The .wasm file is a real WebAssembly binary. Run file three.wasm and see for yourself.

Q: Can it do everything three.js does?

It can spin a cube. What more do you need?

Q: What about TypeScript support?

WebAssembly is typed at the instruction level. Every type is either i32, i64, f32, or f64. No any. No unknown. No as const satisfies readonly. Just math.

Q: Should I migrate my production app?

Absolutely. What could go wrong?

Live Demo

Open index.html with a local server:

npx serve .

License

MIT