perf: enable vue-loader template compilation caching

Author: yyx990803

packages/@vue/cli-service/lib/config/base.js

@@ -3,7 +3,6 @@ module.exports = (api, options) => {
     const resolveLocal = require('../util/resolveLocal')
     const getAssetPath = require('../util/getAssetPath')
     const inlineLimit = 10000
-    const useThreads = process.env.NODE_ENV === 'production' && options.parallel
 
     webpackConfig
       .context(api.service.context)
@@ -44,29 +43,22 @@ module.exports = (api, options) => {
     // vue-loader --------------------------------------------------------------
 
     const { genCacheConfig } = require('@vue/cli-shared-utils')
+    const vueLoaderCacheConfig = genCacheConfig(api, options, 'vue-loader')
 
-    const vueRule = webpackConfig.module
+    webpackConfig.module
       .rule('vue')
         .test(/\.vue$/)
         .use('cache-loader')
           .loader('cache-loader')
-          .options(genCacheConfig(api, options, 'vue-loader'))
+          .options(vueLoaderCacheConfig)
           .end()
-
-    if (useThreads) {
-      vueRule
-        .use('thread-loader')
-          .loader('thread-loader')
-    }
-
-    vueRule
-      .use('vue-loader')
-        .loader('vue-loader')
-        .options({
-          compilerOptions: {
-            preserveWhitespace: false
-          }
-        })
+        .use('vue-loader')
+          .loader('vue-loader')
+          .options(Object.assign({
+            compilerOptions: {
+              preserveWhitespace: false
+            }
+          }, vueLoaderCacheConfig))
 
     webpackConfig
       .plugin('vue-loader')

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

@@ -56,7 +56,7 @@
     "thread-loader": "^1.1.5",
     "uglifyjs-webpack-plugin": "^1.2.5",
     "url-loader": "^1.0.1",
-    "vue-loader": "^15.1.0",
+    "vue-loader": "^15.2.0",
     "vue-template-compiler": "^2.5.16",
     "webpack": "^4.8.2",
     "webpack-chain": "^4.8.0",

yarn.lock

@@ -10669,9 +10669,9 @@ vue-jest@^2.6.0:
     tsconfig "^7.0.0"
     vue-template-es2015-compiler "^1.6.0"
 
-vue-loader@^15.1.0:
-  version "15.1.0"
-  resolved "https://registry.yarnpkg.com/vue-loader/-/vue-loader-15.1.0.tgz#82a2a5c310951aba17ad5d8680fe016c77d37e80"
+vue-loader@^15.2.0:
+  version "15.2.0"
+  resolved "https://registry.yarnpkg.com/vue-loader/-/vue-loader-15.2.0.tgz#5a8138e490a1040942d2f10ae68fa72b5a923364"
   dependencies:
     "@vue/component-compiler-utils" "^1.2.1"
     hash-sum "^1.0.2"