I've been doing this since the first-gen rMBP, and I've never had this issue. No matter my scaling, I idle at about 5% CPU with about 80 tabs and 10 windows ac

I've been doing this since the first-gen rMBP, and I've never had this issue. No matter my scaling, I idle at about 5% CPU with about 80 tabs and 10 windows actively open.