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by aschneid 2885 days ago
There's currently a bug with multi-GPU based MBPs and the new metal renderer. The new metal renderer causes it to always use high performance graphics whether plugged in or not. I had to debug why my battery was dying faster than usual and traced it back to iTerm2 and the metal renderer.

The developer was working on the fix, but I have not seen a fix announced in the release notes yet.