Today I returned from my lunch break to find my computer fan blowing at full throttle.
Looking at Task Manager, I found that Rainbow was keeping 30% of my CPU busy, plus almost 60% GPU.
It isn't the first time this has happened. I think it has something to do with display resizing. I have a Dell UP3216Q display (32" 4K running at 125% scaling in Win10 version 1709), and during long breaks I turn off the screen.
Not all applications like this. They get resized to VGA and then back when the screen is turned back one.
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