webpack 效率及性能提升

1.//比UglifyJsPlugin压缩给力1倍的压缩工具

var ParallelUglifyPlugin = require(‘webpack-parallel-uglify-plugin‘)

   new ParallelUglifyPlugin({
      cacheDir: ‘.cache/‘,
      uglifyJS: {
        output: {
          comments: false
        },
        compress: {
          warnings: false
        }
      }
    }),

2.　　

/*
*myhappy的加速度并不显著,可能需要电脑配置.但是命中cache后速度会翻倍.
*主要的时间消耗是在js的转换上,就是babel-loader js,大概要23秒.
*压缩时间大概是10秒.

*https://github.com/amireh/happypack

*http://taobaofed.org/blog/2016/12/08/happypack-source-code-analysis/
*/

var myHappyPack = new HappyPack({
  loaders: [{
    // id: ‘js‘,
    loader: ‘babel-loader‘,
    threadPool: happyThreadPool,
    options: {
      cacheDirectory: true,
    }
  }]
})

然后加入到plugins:[]里

3.推荐的tool,效率与实用平衡考虑

//http://www.cnblogs.com/imwtr/p/7801973.html

devtool: isdev ? "cheap-module-eval-source-map" : "cheap-source-map",

4.如果用到将公用js 合并 至 CommonsChunkPlugin ,则开发环境的vendor引用应该放在最前面,否则会报webpackjsonp错误.