add cached loaders and plugins

tweak settings

tweak variable names

.gitignore

@@ -1,5 +1,6 @@
 .idea/
 .vscode/
+.cache-loader/
 node_modules/
 build
 .DS_Store

packages/react-dev-utils/createHashFromPaths.js

@@ -0,0 +1,69 @@
+'use strict';
+
+const crypto = require('crypto');
+const path = require('path');
+const fs = require('fs');
+
+const getSources = (paths = [], sourceMethod = function() {}, exclude = []) => {
+  const getSource = (somePath = '') => {
+    try {
+      if (fs.lstatSync(somePath).isDirectory()) {
+        if (
+          exclude.includes(somePath) ||
+          exclude.find(excluded => somePath.startsWith(excluded))
+        ) {
+          return somePath;
+        }
+        const fileList = fs.readdirSync(somePath);
+        return getSources(
+          fileList.map(file => path.join(somePath, file)),
+          sourceMethod
+        );
+      } else {
+        return sourceMethod(somePath);
+      }
+    } catch (ignored) {
+      return somePath;
+    }
+  };
+  let result = '';
+  for (let i = paths.length - 1; i >= 0; i--) {
+    result += getSource(paths[i]);
+  }
+  return result;
+};
+
+const getSourceMethod = key => {
+  const cases = {
+    content: filePath => fs.readFileSync(filePath, 'utf-8'),
+    mtime: filePath => `${filePath}_${fs.statSync(filePath).mtime}`,
+  };
+
+  const found = cases[key];
+
+  if (found) {
+    return found;
+  }
+
+  console.error(
+    'Error from createHashFromPaths:\n\n',
+    'Source method is not recognized, possible values are:\n\n',
+    Object.keys(cases).map(e => '`' + e + '`').join(', '),
+    '\n'
+  );
+  process.exit(1);
+};
+
+const createHashFromPaths = ({ paths, exclude, method = 'mtime' }) => {
+  const hash = crypto.createHash('md5');
+  hash.update(paths.join(''));
+  if (Array.isArray(paths)) {
+    const sourceMethod = getSourceMethod(method);
+    const sources = getSources(paths, sourceMethod, exclude);
+    hash.update(sources);
+  }
+
+  return hash.digest('hex');
+};
+
+module.exports = createHashFromPaths;

packages/react-dev-utils/package.json

@@ -15,6 +15,7 @@
     "checkRequiredFiles.js",
     "clearConsole.js",
     "crashOverlay.js",
+    "createHashFromPaths.js",
     "crossSpawn.js",
     "eslintFormatter.js",
     "FileSizeReporter.js",

packages/react-scripts/config/webpack.config.dev.js

@@ -19,8 +19,10 @@ const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
 const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
 const eslintFormatter = require('react-dev-utils/eslintFormatter');
 const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
+const createHashFromPaths = require('react-dev-utils/createHashFromPaths');
 const getClientEnvironment = require('./env');
 const paths = require('./paths');
+const AutoDllWebpackPlugin = require('autodll-webpack-plugin');
 
 // Webpack uses `publicPath` to determine where the app is being served from.
 // In development, we always serve from the root. This makes config easier.
@@ -170,17 +172,22 @@ module.exports = {
           {
             test: /\.(js|jsx)$/,
             include: paths.appSrc,
-            loader: require.resolve('babel-loader'),
-            options: {
-              // @remove-on-eject-begin
-              babelrc: false,
-              presets: [require.resolve('babel-preset-react-app')],
-              // @remove-on-eject-end
-              // This is a feature of `babel-loader` for webpack (not Babel itself).
-              // It enables caching results in ./node_modules/.cache/babel-loader/
-              // directory for faster rebuilds.
-              cacheDirectory: true,
-            },
+            use: [
+              require.resolve('cache-loader'),
+              {
+                loader: require.resolve('babel-loader'),
+                options: {
+                  // @remove-on-eject-begin
+                  babelrc: false,
+                  presets: [require.resolve('babel-preset-react-app')],
+                  // @remove-on-eject-end
+                  // This is a feature of `babel-loader` for webpack (not Babel itself).
+                  // It enables caching results in ./node_modules/.cache/babel-loader/
+                  // directory for faster rebuilds.
+                  cacheDirectory: true,
+                },
+              },
+            ],
           },
           // "postcss" loader applies autoprefixer to our CSS.
           // "css" loader resolves paths in CSS and adds assets as dependencies.
@@ -190,6 +197,7 @@ module.exports = {
           {
             test: /\.css$/,
             use: [
+              require.resolve('cache-loader'),
               require.resolve('style-loader'),
               {
                 loader: require.resolve('css-loader'),
@@ -252,6 +260,18 @@ module.exports = {
       inject: true,
       template: paths.appHtml,
     }),
+    new AutoDllWebpackPlugin({
+      env: process.env.NODE_ENV,
+      additionalHash: createHashFromPaths({
+        paths: [paths.appNodeModules],
+        exclude: [path.join(paths.appNodeModules, '.cache')],
+      }),
+      inject: true,
+      filename: '[name].[hash].js',
+      entry: {
+        vendor: ['react', 'react-dom'],
+      },
+    }),
     // Add module names to factory functions so they appear in browser profiler.
     new webpack.NamedModulesPlugin(),
     // Makes some environment variables available to the JS code, for example:

packages/react-scripts/config/webpack.config.prod.js

@@ -20,8 +20,12 @@ const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
 const SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');
 const eslintFormatter = require('react-dev-utils/eslintFormatter');
 const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
+const createHashFromPaths = require('react-dev-utils/createHashFromPaths');
+const AutoDllWebpackPlugin = require('autodll-webpack-plugin');
+const WebpackUglifyParallel = require('webpack-uglify-parallel');
 const paths = require('./paths');
 const getClientEnvironment = require('./env');
+const os = require('os');
 
 // Webpack uses `publicPath` to determine where the app is being served from.
 // It requires a trailing slash, or the file assets will get an incorrect path.
@@ -171,14 +175,19 @@ module.exports = {
           {
             test: /\.(js|jsx)$/,
             include: paths.appSrc,
-            loader: require.resolve('babel-loader'),
-            options: {
-              // @remove-on-eject-begin
-              babelrc: false,
-              presets: [require.resolve('babel-preset-react-app')],
-              // @remove-on-eject-end
-              compact: true,
-            },
+            use: [
+              require.resolve('cache-loader'),
+              {
+                loader: require.resolve('babel-loader'),
+                options: {
+                  // @remove-on-eject-begin
+                  babelrc: false,
+                  presets: [require.resolve('babel-preset-react-app')],
+                  // @remove-on-eject-end
+                  compact: true,
+                },
+              },
+            ],
           },
           // The notation here is somewhat confusing.
           // "postcss" loader applies autoprefixer to our CSS.
@@ -199,6 +208,8 @@ module.exports = {
                 {
                   fallback: require.resolve('style-loader'),
                   use: [
+                    require.resolve('cache-loader'),
+
                     {
                       loader: require.resolve('css-loader'),
                       options: {
@@ -279,13 +290,23 @@ module.exports = {
         minifyURLs: true,
       },
     }),
+    new AutoDllWebpackPlugin({
+      env: process.env.NODE_ENV,
+      additionalHash: createHashFromPaths({
+        paths: [paths.appNodeModules],
+        exclude: [path.join(paths.appNodeModules, '.cache')],
+      }),
+      inject: true,
+      filename: '[name].[hash].js',
+    }),
     // Makes some environment variables available to the JS code, for example:
     // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
     // It is absolutely essential that NODE_ENV was set to production here.
     // Otherwise React will be compiled in the very slow development mode.
     new webpack.DefinePlugin(env.stringified),
     // Minify the code.
-    new webpack.optimize.UglifyJsPlugin({
+    new WebpackUglifyParallel({
+      workers: os.cpus().length,
       compress: {
         warnings: false,
         // Disabled because of an issue with Uglify breaking seemingly valid code:

packages/react-scripts/package.json

@@ -21,13 +21,15 @@
     "react-scripts": "./bin/react-scripts.js"
   },
   "dependencies": {
+    "autodll-webpack-plugin": "^0.2.1",
     "autoprefixer": "7.1.1",
     "babel-core": "6.25.0",
     "babel-eslint": "7.2.3",
     "babel-jest": "20.0.3",
     "babel-loader": "7.0.0",
     "babel-preset-react-app": "^3.0.1",
     "babel-runtime": "6.23.0",
+    "cache-loader": "^1.0.3",
     "case-sensitive-paths-webpack-plugin": "2.1.1",
     "chalk": "1.1.3",
     "css-loader": "0.28.4",
@@ -56,6 +58,7 @@
     "webpack": "2.6.1",
     "webpack-dev-server": "2.5.0",
     "webpack-manifest-plugin": "1.1.0",
+    "webpack-uglify-parallel": "^0.1.3",
     "whatwg-fetch": "2.0.3"
   },
   "devDependencies": {