Compare the bundle times of React using envify and loose-envify.
envify:
$ for i in {1..5}; do node bench.js 'envify'; done
1614ms
1597ms
1643ms
1544ms
1575ms
loose-envify:
$ for i in {1..5}; do node bench.js 'loose-envify'; done
1101ms
1085ms
1089ms
1103ms
1134ms