Chrome Version: 60.0.3091.0
OS: macOS 10.12

What steps will reproduce the problem?
(1) Visit wired.com (site archived at https://drive.google.com/open?id=0BwcLL5PHtZQHcEk3VTBuWllNdVk )

What is the expected result?
Given that CPU use is confined to the renderer in both Chrome and Safari, the renderers/browsers should consume about the same amount of energy.

What happens instead?
Safari's renderer consumes 3.5% vs. Chromium at 10%, almost 2x greater.

Part of the extra CPU use comes from unneeded painting activity, which is covered under  Issue 725230 .