Discussion on: Webpack style-loader, what does it cost?

I'm maintaining (and developing features into) a big project with webpack. I've to say that in my experience Parcel.js (after reading the doc, trying it a bit and trying to put some things that could malfunction to see how it handles all things) is the best bundler I found.
We use it on new projects. If you want bes performance you will engineer your front-end properly to fit parcel behavior and you'll get fast development and fast output for production.