New Creator Dashboard takes up massive CPU, GPU
I tried to run a stream last night with the new Creator Dashboard as my chat interface, but when I went live I noticed Google Chrome was taking up over 50% CPU and around 40% GPU, causing my game to have massive performance issues. When I used Chrome's Task Manager, I found that it was the Creator Dashboard tab taking up the majority of the CPU. As soon as I switched back to the old Twitch Dashboard, my PC's performance improved tremendously.
Something on the new Creator Dashboard is way too CPU intensive, and I'm not sure which component it is (although my suspicion is the Stream Health widget, which never seems to work properly).
CPU/GPU performance must improve greatly before I can use this over the old Dashboard.

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TheAlkaris commented
Pause the video player and minimize the stream player preview.
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GoblinKing2Cynn commented
im having this same problem.