feat: parallel mode

packages/@vue/cli-plugin-babel/index.js

@@ -1,8 +1,9 @@
-module.exports = api => {
+module.exports = (api, options) => {
+  const useThreads = process.env.NODE_ENV === 'production' && options.parallel
   const cacheDirectory = api.resolve('node_modules/.cache/cache-loader')
 
   api.chainWebpack(webpackConfig => {
-    webpackConfig.module
+    const jsRule = webpackConfig.module
       .rule('js')
         .test(/\.jsx?$/)
         .include
@@ -13,8 +14,16 @@ module.exports = api => {
           .loader('cache-loader')
           .options({ cacheDirectory })
           .end()
-        .use('babel-loader')
-          .loader('babel-loader')
+
+    if (useThreads) {
+      jsRule
+        .use('thread-loader')
+          .loader('thread-loader')
+    }
+
+    jsRule
+      .use('babel-loader')
+        .loader('babel-loader')
 
     webpackConfig.module
       .rule('vue')
@@ -25,11 +34,16 @@ module.exports = api => {
             {
               loader: 'cache-loader',
               options: { cacheDirectory }
-            },
-            {
-              loader: 'babel-loader'
             }
           ]
+          if (useThreads) {
+            options.loaders.js.push({
+              loader: 'thread-loader'
+            })
+          }
+          options.loaders.js.push({
+            loader: 'babel-loader'
+          })
           return options
         })
   })

packages/@vue/cli-plugin-typescript/index.js

@@ -1,4 +1,9 @@
-module.exports = (api, options) => {
+module.exports = (api, {
+  parallel,
+  lintOnSave,
+  experimentalCompileTsWithBabel
+}) => {
+  const useThreads = process.env.NODE_ENV === 'production' && parallel
   const cacheDirectory = api.resolve('node_modules/.cache/cache-loader')
 
   api.chainWebpack(config => {
@@ -17,82 +22,69 @@ module.exports = (api, options) => {
           .add(api.resolve('src'))
           .add(api.resolve('test'))
           .end()
-        .use('cache-loader')
-          .loader('cache-loader')
-          .options({ cacheDirectory })
-          .end()
 
     const vueLoader = config.module
       .rule('vue')
         .use('vue-loader')
-        .tap(options => {
-          options.loaders = options.loaders || {}
-          options.loaders.ts = [
-            {
-              loader: 'cache-loader',
-              options: { cacheDirectory }
-            }
-          ]
-          return options
-        })
 
-    if (!options.experimentalCompileTsWithBabel) {
-      const tsLoaderOptions = {
-        transpileOnly: true,
-        appendTsSuffixTo: [/\.vue$/]
+    // add a loader to both *.ts & vue<lang="ts">
+    const addLoader = loader => {
+      const use = tsRule
+        .use(loader.loader)
+          .loader(loader.loader)
+      if (loader.options) {
+        use.options(loader.options)
       }
+      vueLoader.tap(options => {
+        options.loaders = options.loaders || {}
+        options.loaders.ts = options.loaders.ts || []
+        options.loaders.ts.push(loader)
+        return options
+      })
+    }
 
-      // if has babel plugin, inject babel-loader before ts-loader
+    addLoader({
+      loader: 'cache-loader',
+      options: { cacheDirectory }
+    })
+    if (useThreads) {
+      addLoader({
+        loader: 'thread-loader'
+      })
+    }
+
+    if (!experimentalCompileTsWithBabel) {
       if (api.hasPlugin('babel')) {
-        tsRule
-          .use('babel-loader')
-            .loader('babel-loader')
-        vueLoader
-          .tap(options => {
-            options.loaders.ts.push({
-              loader: 'babel-loader'
-            })
-            return options
-          })
-      }
-
-      // apply ts-loader
-      tsRule
-        .use('ts-loader')
-          .loader('ts-loader')
-          .options(tsLoaderOptions)
-      vueLoader
-        .tap(options => {
-          options.loaders.ts.push({
-            loader: 'ts-loader',
-            options: tsLoaderOptions
-          })
-          return options
+        addLoader({
+          loader: 'babel-loader'
         })
+      }
+      addLoader({
+        loader: 'ts-loader',
+        options: {
+          transpileOnly: true,
+          appendTsSuffixTo: [/\.vue$/],
+          // https://github.com/TypeStrong/ts-loader#happypackmode-boolean-defaultfalse
+          happyPackMode: useThreads
+        }
+      })
     } else {
       // Experimental: compile TS with babel so that it can leverage
       // preset-env for auto-detected polyfills based on browserslists config.
       // this is pending on the readiness of @babel/preset-typescript.
-      tsRule
-        .use('babel-loader')
-          .loader('babel-loader')
-      vueLoader
-        .tap(options => {
-          options.loaders.ts.push(
-            {
-              loader: 'babel-loader'
-            }
-          )
-          return options
-        })
+      addLoader({
+        loader: 'babel-loader'
+      })
     }
 
     config
       .plugin('fork-ts-checker')
         .use(require('fork-ts-checker-webpack-plugin'), [{
           vue: true,
-          tslint: options.lintOnSave,
-          formatter: 'codeframe'
+          tslint: lintOnSave,
+          formatter: 'codeframe',
+          // https://github.com/TypeStrong/ts-loader#happypackmode-boolean-defaultfalse
+          checkSyntacticErrors: useThreads
         }])
   })
 

packages/@vue/cli-service/lib/options.js

@@ -6,6 +6,7 @@ const schema = createSchema(joi => joi.object({
   compiler: joi.boolean(),
   productionSourceMap: joi.boolean(),
   vueLoader: joi.object(),
+  parallel: joi.boolean(),
   dll: joi.alternatives().try(
     joi.boolean(),
     joi.array().items(joi.string())
@@ -22,8 +23,7 @@ const schema = createSchema(joi => joi.object({
   }),
   devServer: joi.object(),
   // known options from offical plugins
-  lintOnSave: joi.boolean(),
-  pwa: joi.object()
+  lintOnSave: joi.boolean()
 }))
 
 exports.validate = options => validate(
@@ -49,6 +49,14 @@ exports.defaults = () => ({
   // sourceMap for production build?
   productionSourceMap: true,
 
+  // use thread-loader for babel & TS in production build
+  // enabled by default if the machine has more than 1 cores
+  parallel: require('os').cpus().length > 1,
+
+  // split vendors using autoDLLPlugin?
+  // can be an explicit list of dependencies to include in the DLL chunk.
+  dll: false,
+
   css: {
     // boolean | Object, extract css?
     extract: true,

packages/@vue/cli-service/package.json

@@ -52,6 +52,7 @@
     "slash": "^1.0.0",
     "source-map-url": "^0.4.0",
     "string.prototype.padend": "^3.0.0",
+    "thread-loader": "^1.1.2",
     "uglifyjs-webpack-plugin": "^1.1.6",
     "url-loader": "^0.6.2",
     "vue-loader": "^13.7.0",

yarn.lock

@@ -1068,7 +1068,7 @@ async@^1.4.0, async@^1.5.0, async@^1.5.2:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
 
-async@^2.1.2, async@^2.1.4, async@^2.4.0, async@^2.4.1:
+async@^2.1.2, async@^2.1.4, async@^2.3.0, async@^2.4.0, async@^2.4.1:
   version "2.6.0"
   resolved "https://registry.yarnpkg.com/async/-/async-2.6.0.tgz#61a29abb6fcc026fea77e56d1c6ec53a795951f4"
   dependencies:
@@ -6112,31 +6112,6 @@ levn@^0.3.0, levn@~0.3.0:
     prelude-ls "~1.1.2"
     type-check "~0.3.2"
 
-lint-staged@^6.0.0:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/lint-staged/-/lint-staged-6.1.0.tgz#28f600c10a6cbd249ceb003118a1552e53544a93"
-  dependencies:
-    app-root-path "^2.0.0"
-    chalk "^2.1.0"
-    commander "^2.11.0"
-    cosmiconfig "^4.0.0"
-    debug "^3.1.0"
-    dedent "^0.7.0"
-    execa "^0.8.0"
-    find-parent-dir "^0.3.0"
-    is-glob "^4.0.0"
-    jest-validate "^21.1.0"
-    listr "^0.13.0"
-    lodash "^4.17.4"
-    log-symbols "^2.0.0"
-    minimatch "^3.0.0"
-    npm-which "^3.0.1"
-    p-map "^1.1.1"
-    path-is-inside "^1.0.2"
-    pify "^3.0.0"
-    staged-git-files "0.0.4"
-    stringify-object "^3.2.0"
-
 lint-staged@^6.0.1:
   version "6.0.1"
   resolved "https://registry.yarnpkg.com/lint-staged/-/lint-staged-6.0.1.tgz#855f2993ab4a265430e2fd9828427e648d65e6b4"
@@ -9467,6 +9442,14 @@ text-table@~0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
 
+thread-loader@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/thread-loader/-/thread-loader-1.1.2.tgz#45dd1af01d8e421e6002b3c19358650cb9a42518"
+  dependencies:
+    async "^2.3.0"
+    loader-runner "^2.3.0"
+    loader-utils "^1.1.0"
+
 throat@^4.0.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/throat/-/throat-4.1.0.tgz#89037cbc92c56ab18926e6ba4cbb200e15672a6a"