I bought Lenovo Legion Y740 laptop today. Unfortunately I've found two dead pixels. I've read about some techniques to fix dead pixels. Basically it involves quickly switching pixel colors, so I decided to try it.
My version uses requestAnimationFrame, so it should work a little bit faster on high-FPS screens. Also I used Blixt's PRNG to improve frame rate as well.
Currently mobile devices are not supported, but I'll try to implement mobile device support later.
I'll report later whether it helped to repair last dead pixel.