Rule Proposal: Require "shouldComponentUpdate" or PureRenderMixin to be applied

[EvHaus]

On our team, we want to ensure all components are optimized. This means either PureRenderMixin must be applied on the component, or the component must have a shouldComponentUpdate method defined. It would be great if ESLint could warn developers when they have forgotten to optimize.

[mxstbr]

Is this by chance being worked on? This would be a great addition that'd be much appreciated!

[EvHaus]

I've taken a stab at this in the eslint-plugin-cumul8 repo (npm install eslint-plugin-cumul8). Will test this in various codebases before submitting as a PR to eslint-plugin-react Looking to others for testing and feedback.

Documentation here: https://github.com/Eight-Solutions/eslint-plugin-cumul8/blob/master/docs/rules/react-require-optimization.md