vue-cli での webpack3 速度の最適化に関連する問題

npm install babel-plugin-import --save-dev

// .babelrc
{
 "plugins": [["import", {
 "libraryName": "iview",
 "libraryDirectory": "src/components"
 }]]
}

import { Button } from 'iview'
Vue.component('Table', Table)

npm install happypack --save-dev

// /build/webpack.base.conf.js
const HappyPack = require('happypack')
const os = require('os')
const happyThreadPool = HappyPack.ThreadPool({ size: os.cpus().length })
// 增加HappyPack插件
plugins: [
 new HappyPack({
  id: 'happy-babel-js',
  loaders: ['babel-loader?cacheDirectory=true'],
  threadPool: happyThreadPool,
 })
 ]
// 修改引入loader
{
 test: /\.js$/,
 // loader: 'babel-loader',
 loader: 'happypack/loader?id=happy-babel-js', // 增加新的HappyPack构建loader
 include: [resolve('src'), resolve('test')]
}

// /config/index.js
dev环境：devtool: 'eval'（最快速度）
prod环境：productionSourceMap: false（关闭source-map）

// /src/main.js
const isDebug_mode = process.env.NODE_ENV !== 'production'
Vue.config.debug = isDebug_mode
Vue.config.devtools = isDebug_mode
Vue.config.productionTip = isDebug_mode

const path = require("path")
const webpack = require("webpack")

module.exports = {
 // 你想要打包的模块的数组
 entry: {
  vendor: ['vue/dist/vue.esm.js', 'axios', 'vue-router', 'iview']
 },
 output: {
  path: path.join(__dirname, '../static/js'), // 打包后文件输出的位置
  filename: '[name].dll.js',
  library: '[name]_library'
 },
 plugins: [
  new webpack.DllPlugin({
   path: path.join(__dirname, '.', '[name]-manifest.json'),
   name: '[name]_library',
   context: __dirname
  }),
  // 压缩打包的文件
  new webpack.optimize.UglifyJsPlugin({
   compress: {
    warnings: false
   }
  })
 ]
}

new webpack.DllReferencePlugin({
  context: __dirname,
  manifest: require('./vendor-manifest.json')
})

"dll": "webpack --config ./build/webpack.dll.config.js"