Synchronization of cursor and drawings is laggy

[gy-mate]

Describe the bug

The synchronization of the cursor, drawings and annotations from presenter to play mode is really laggy:

Screen.Recording.2024-06-18.at.01.37.22.mov

To reproduce

Steps to reproduce the behavior:

1. Run my presentation:

   git clone https://github.com/gy-mate/kalauz
   cd kalauz/presentation
   git checkout ef1967e5
   npx slidev

2. Open http://localhost:3030/presenter/19

3. Open http://localhost:3030/19 in another window

Desktop

• OS: macOS 14.5
• Browser: Chrome 126.0.6478.62 (drawings are laggy in Safari 17.5 too)
• Slidev version: 0.49.10 (global)