Danmaku at scale
Thousands of live comments on one canvas — each individually interactive and accessible, where DOM-based danmaku chokes past ~200.
On-screen 0FPS 60DOM nodes 0Pool 0
Sample clip: Sintel © Blender Foundation — durian.blender.org (CC BY 3.0). Click 📁 Upload to play your own video; use 🔇 to toggle its sound.
Performance report — real browser, real GPU
Why this is hard
DOM danmaku (Bilibili)
Every comment is a <div>: fully interactive and accessible, but the browser chokes past ~200 on screen.
Canvas-2D danmaku
Thousands of comments as raw fillText pixels: smooth, but you can't hover, click, or read a single one.
VectoUI
Thousands of real entities: smooth like canvas, yet each is hit-tested — and any one can project a real ARIA node an agent can drive.