I’ve been experimenting with WebGPU and built a benchmark that simulates and renders up to *15,000,000 moving nodes(rectangles)* in real time in the browser.

Each node has its own position, velocity, size, and color. All simulation and rendering happens entirely on the GPU:

• GPU compute shader updates positions • GPU performs visibility checks • GPU maintains a visibility counter via atomics • Indirect draw calls per chunk • CPU does minimal work (just submits commands)

The demo starts at 50,000 nodes, but you can type any number up to ~15M and reset.

Warning: This is a GPU stress test. Large node counts may cause slowdowns, thermal spikes, or browser crashes on some hardware.

Demo: https://ajlaston.github.io/Nova-Web/

Code: https://github.com/ajlaston/Nova-Web

I’d be interested in performance reports across different GPUs, browsers, and platforms. Feedback on the architecture is welcome.

Tested it on a RX 7800XT on Chromium 142 (Windows) and it maintains 60fps up to ~6M nodes, very impressive.