It's using 0.7 mb on my Surface Pro. However, its 6.15pm right now, maybe usage goes up when it actually starts dimming. I've never had noticeable performance i

It's using 0.7 mb on my Surface Pro. However, its 6.15pm right now, maybe usage goes up when it actually starts dimming. I've never had noticeable performance issues because of it though, and I run it on my 7 year old Macbook Pro as well.