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In my experience with other apps, I think the GPU behavior is an artifact of Core Animation (I definitely recall seeing this in Sparrow, at least). Bit weird that OSX would default to breaking out the GPU for the smallest UI effects, especially because of the effect on battery life.

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Yeah, and it's annoying that the discrete switch is kept until the app shuts down. I have no clue what Gitbox is doing on the change set viewer to trigger the switch. I didn't see any animations.

Chrome also triggers the discrete GPU so I can't use it either. I'd really like to because of Safari's problems with the debug tools. I don't want to get used to Chrome when I can only realistically use it when on power.

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