A very quick and dead simple comparison between Parcel, Rollup and Webpack.
# install dependencies
yarn
# build with webpack (to dir: wpck/)
yarn wbpck
# build with rollup (to dir: rllp/)
yarn rllp
# build with parcel (to dir: dist/)
yarn prcl
Webpack (99KB):
Rollup (7KB):
Parcel (66KB):