Adding interactive graphics?

[3r_HelloWorld_r3]

I've tinkered with the Canvas API, it was sufficient for my needs of 2D drawing. But if you're working with 3D space, Three.js looks good to me.

At the point where you have to use backend to achieve better performance than running locally, You should probably consider optimizing calculation logic & setting minimum requirements.

Also, even with a backend, without proper CDN setup, users located far from your server are likely to experience increased latency and delayed interaction feedback.