- browser-perf - a tool to automate calculating performance metrics like frame rates for a website
- web-perf.github.io/react-perf - Tracing ReactJS performance across versions of the library
- React-worker-dom - Implementation of ReactJS in a web worker. Alternate implemenetation using jsdom like proxy.
Unfortunately, all this work now competes for the same resources that the browser needs, to do things like render a page, or apply styles. In many cases, this makes the browser slow, preventing the web application from attaining its full, smooth experience.
Web workers have been in the browser for a while, but they have mostly been used for engaging demos like adding mustaches in a cat video :)