Pundle (Peaceful Bundle) is a next generation module bundler. It allows you to use Node.js style require statements in the browser and supports splitting out of the box with import() syntax. It uses worker processes to parallelize the work as much as possible, that combined with a file system transform cache delivers amazing performance on recurrent builds.
You can read how it works in this series of posts:
This series of posts is a Work-in-Progress and would be updated as Pundle furthers it's path towards release.