https://swizec.com/blog/dirty-hack-took-30percent-off-webpack-size/swizec/7657
Webpack plugin and CLI utility that represents bundle content as convenient interactive zoomable treemap https://www.npmjs.com/package/webpack-bundle-analyzer
origin - http://www.pipiscrew.com/2017/06/a-dirty-webpack-trick-that-reduced-our-gzipped-bundle-size-by-55kb/ a-dirty-webpack-trick-that-reduced-our-gzipped-bundle-size-by-55kb