title: How to improve Webpack performance in Dev Environment?
body: <p>How do i improve the webpack build time. Presently i am packing around 150 files. and taking around 15 secs(Which is too much time). And majority of time is being eaten up during "optimize chunk assets" which takes around 10 secs. Any way to bring this down to 3-4 secs max. </p>
  
  <p>Or how do i disable the optimize step in webpack. I am not explicitly using any configuration for minifying/uglifying.</p>
  
  <p>This is the Configuration i am using presently::</p>
  
  <pre><code>module.exports = {
  context: __dirname,
  entry: './js/main.js',
  target: 'web',
  module: {
      loaders: [
          { test: /text!/, loader: 'raw-loader'},
          { test: /backbone/, loader: 'imports-loader?this=&gt;window' },
          { test: /marionette/, loader: 'imports-loader?this=&gt;window' },
          { test: /sprintf/, loader: 'script-loader' },
          { test: /\.css$/, loader: "style!css" },
          { test: /\.scss$/, loader: 'style!css!sass' },
          { test: /\.js$/, loader: 'jsx-loader?harmony' }
      ]
  },
  resolveLoader: {
      root: path.join(__dirname, 'node_modules'),
      alias: {
          'text': 'raw'
      }
  },
  output: {
      filename: 'bundle.js',
      library: 'require',
      libraryTarget: 'this'
  },
  resolve: {
      alias: alias,
      root: path.join(__dirname, 'node_modules'),
      extensions: ['', '.js', '.jsx']
  },
  externals: {
      jquery: 'jQuery'
  },
  plugins: [
      new webpack.ProvidePlugin({
          $: 'jquery',
          jQuery: 'jquery',
          'window.jQuery': 'jquery',
          'root.jQuery': 'jquery',
          'Backbone': 'backbone',
          '_': 'underscore',
          'Marionette': 'marionette',
          'sprintf': 'sprintf'
      })
  ],
  devtool: 'source-map'
  };
  </code></pre>
  
  <p>Thanks for the help in Advance.</p>