Chosen Solution

I have Pixel 2 with 128GB Hynix UFS and 4GB Samsung DDR4 RAM. I got an accident and makes my Pixel 2 screen’s broken, and now I want to replace the screen. I buy the screen from local seller (I live in Indonesia) and when I test the screen, my Pixel 2 become very lag and slow. Anybody have / experienced this problem?
And what should I do to fix this problem?

Is it possible that your replacement screen is faulty? It sounds like you might be suffering from laggy touch on the part. If the old broken screen still works, connect it back and see if it’s laggy.