Mosaic, Netslide, Mine, etc.: Moving large grid with arrow keys causes a lot of lag

[Not-A-Normal-Robot]

Describe the bug
When you use arrow keys and the cursor would go off-screen if you move it, the grid will move so that the cursor will always stay on-screen. However, for some reason this causes quite a bit of lag, and is even more extreme with grid size and tap speed.

To Reproduce
Steps to reproduce the behavior:

1. Go to one of the games that uses a grid and supports arrow keys (e.g. Mine)
2. Generate a large puzzle (say, 50×50)
3. Zoom in
4. Hold the 'right' arrow key

Expected behavior
Moving the grid this way should not cause lag to the point where the game slows to a crawl (<1 fps).

Version info (optional, but sometimes helpful)

• Phone/tablet model: Redmi 9
• Android version: 12
• App version: 2024-03-29-2245-fd304c53