Minification 美: [mɪnɪfɪ'keɪʃən] n. 缩小率；缩小尺寸；减少；削减

minify 美: ['mɪnɪˌfaɪ] v. 弄小(少)；削减；轻视

(就是脸熟一下, 用英语怎么表达这个压缩概念的)

var array = [];
for (var i = 0; i < 20; i++) {
  array[i] = i;
}

for(var a=[i=0];i<20;a[i]=i++);

https://en.wikipedia.org/wiki/Minification_(programming)

https://developers.google.com/speed/docs/insights/MinifyResources