The react app scaffolder is extremely slow to compile

[willmcvay]

• The scaffolder appears to be working fine now, verified however for dev builds it is extremely slow to first paint and seems to be blocked somewhere in webpack - the main thread is blocked and the browser freezes.
• There is a webpack warning you can see in the dev tools saying that the webpack cache environment is not setup in the webpack.config.js - this would be a good starting place to look.
• Looks like a build issue rather than a code issue but could be wrong.
• FYI best way to approach this is to yarn link in the scaffolder folder then yarn link @reapit/generator-react-app-scaffolder in a target folder, then yo @reapit/react-app-scaffolder and scaffold an app to work on the config. When you have debugged the problem, copy your changes back to the main repo.
• The problem is present in all scaffold configurations and can be replicated after the first build, ie when you run yarn start:dev in the app folder.