If anyone is interested why this is even a thing, you can see here [0] how every change in the IDE repaints whole window, thus eats CPU like mad. On the MacOS with external 4k+ monitor, this really tanks even macpro, like there is no GPU acceleration at all and everything is rendered by the CPU.
[0] - https://photos.app.goo.gl/fsxgEHXCsTzKL37w7