Use source maps to trace back the sources that contribute to your minified JavaScript artifact.
$ npm install minifyretracer
$ minifyretracer app.js.min
source size min size min share min rate zip size zip share zip rate
async.js 27.87 KB 16.54 KB 21.03 % 40.67 % 3.97 KB 18.14 % 75.96 %
bean.js 29.31 KB 14.45 KB 18.38 % 50.71 % 4.68 KB 21.37 % 67.58 %
list.js 41.65 KB 22.24 KB 28.29 % 46.59 % 5.94 KB 27.10 % 73.30 %
backbone.js 59.53 KB 25.35 KB 32.24 % 57.42 % 7.32 KB 33.40 % 71.12 %
TOTAL 158.35 KB 78.57 KB 21.92 KB
MIT License