We recently upgraded our version of headless Chrome from 58 to 59 hoping for a 30% across-the-board reduction in CPU usage, but it wasn't so. This (contrived) benchmark shows a 38% decrease in performance for a React app rendering 100,000 divs.
|chrome 58||chrome 59|
|prerender.cloud (this site)||45ms||34ms||32% faster|
|create-react-app 100,000 hello-world divs||434ms||600ms||38% slower|