Do you want to request a feature or report a bug?
Bug
What is the current behavior?
Incremental load is pretty slow, the initial load doesn’t take very long (20s or so), and it’s not a huge app, but the incremental load takes ~9 seconds.
If the current behavior is a bug, please provide the steps to reproduce.
CPU profile
What is the expected behavior?
It was faster in previous versions of webpack, but also the config changed
If this is a feature request, what is motivation or use case for changing the behavior?
Please mention other relevant information such as the browser version, Node.js version, webpack version, and Operating System.
Webpack 4.6
MacOS 10.13.3
NodeJS 9.11.1
Also note that the default config of the thread-loader is not optimized for watching builds. The readme notes that
poolTimeout: Infinityshould be used when watching, elsewise you pay the worker bootstrap every time.