I just ran that PR and this is what it got: ----------------------------------------- stat -f%z src/dist/bundle.js 15757 gzip -c src/dist/bundle.js | wc -c

I just ran that PR and this is what it got: ----------------------------------------- stat -f%z src/dist/bundle.js 15757 gzip -c src/dist/bundle.js | wc -c 4270 ----------------------------------------- So still not quite as small as the rollup, closure, or webpack